Continuity mistake: After Leia tells Han that she always hated watching him leave and he still drives her crazy, they hug and it cuts to the Starkiller Base. When we see Stormtroopers walking through the corridor and then Rey sneaking away, it's a flipped shot - note the Stormtroopers' backs, and Rey's hip bag and leather wrist cuff.
Revealing mistake: While Poe leads the aerial assault on the oscillator, in the closeups of Poe and other X-wing fighter pilots, note the cockpit windows at the pilots' left and right have identical marks and scratches in their individual X-wings. It's particularly noticeable when one closeup follows another.
Continuity mistake: After the TIE fighter crashes on Jakku, when Finn searches for Poe in the wreckage he finds Poe's jacket and grabs hold of the jacket arm, but when it cuts to the following shots as the ground starts shaking, Finn's holding the top (neck area) of the jacket, even though it never left his hand.
Continuity mistake: After Rey finishes her meal beside the foot of the AT-AT and puts on the Rebel flight helmet, there's an overhead wide shot of the toppled AT-AT and we can see its front knee joint. When Rey hears the commotion with BB-8 she rushes to get her staff, which is now tall and upright in the sand at that knee joint, and had her staff been there in the wide shot we would have seen it.
Continuity mistake: During Rey's lightsaber duel with Kylo Ren, a few shots after Rey does the flip and slices the tree branch, there's a long shot of them in the forest as they're both moving past very distinctive fallen trees around them, and after a few closeups as Kylo keeps advancing on Rey, at the start of the next long shot (right before the chasm first appears behind Rey) they're back to being where they were in the previous long shot.
Continuity mistake: After BB-8 tells Rey that the Resistance base is located in the Illenium system, while Rey is down in the hold she asks Finn for something she needs and she holds her right arm up and points, but in the shot facing Finn it's her left arm that's up pointing as she repeatedly shouts "NO!" to him, and then it's her right arm up again.
Continuity mistake: When Snoke orders, "If what you say about this girl is true, bring her to me," Kylo Ren is wearing his hooded cape. It cuts to Rey restrained in the holding cell, and when it cuts back to Kylo Ren rushing to the holding cell to get Rey and bring her to Snoke his cape is gone. After Rey uses the Force to trick the guard, it cuts back to Kylo Ren arriving at the cell and he's once again wearing his hooded cape.
Continuity mistake: After the Quad Jumper blows up, when Rey, Finn, and BB-8 run to the "garbage" they're running quickly toward the Falcon's forward side - note the cockpit, with its entry ramp lowered and nothing blocking its way, but in the next closeup they're all running from the rear of the Falcon before they rush up its entry ramp.
Continuity mistake: When Rey reaches the top of the ridge and shouts at Teedo, we see there are no footprints in the sand between her and Teedo, so when Rey rushes to BB-8 her lone set of footprints are the only ones behind her in the sand. When Rey walks away from BB-8 telling him "No," there are many more footprints in the sand between her and the droid, even though there should only be the two sets of Rey's footprints - from both coming and going.
Continuity mistake: After the spy, Bazine, communicates that she's found the droid at Maz Kanata's, in the following side closeup of Kylo Ren we have a good view of the distinctive surface dents/hole on the side of his mask (his left side) and this is a flipped shot, then in the front closeup of Ren those dents/hole are now on the opposite side of his mask with different marks the other side.
Continuity mistake: After the First Order has destroyed the Hosnian system, including Hosnian Prime, Finn rushes up to Han and asks him where Rey is, and when it cuts to the shot of Rey running in the forest it's a flipped shot - note the leather cuff is on Rey's right wrist, etc., then in the next shot the cuff is on her left wrist as it should be.
Continuity mistake: When Rey returns to her home in the AT-AT she scratches another mark into the wall, and in the next closeup just as she sits down the top part of Rey's outfit is crisscrossed with her left side over the right and her hip bag is at her left side, but after Rey fills her plate and takes her food, she stands up and her top is crisscrossed the opposite way, etc. The first shot is flipped - note the background, compared to the second shot.
Continuity mistake: After the Starkiller Base weapon is fired at the Hosnian system, when it cuts to Finn loading gear onto Ithano's ship he stops at the top of the stairs and turns to watch the sky. The blaster's strap is beside Finn's neck slung crossbody, but in the shot from behind there's no strap near his neck.
Audio problem: Right before Kylo Ren kills Lor San Tekka, he says "You're so right," and the sound of him igniting his lightsaber while raising it upward, then killing Tekka. You can see red light that is flickering at the bottom of the screen while Ren is talking, meaning that the lightsaber is on, but there is no sound of the lightsaber, and there is still a sound of ignition when it is already on.
Continuity mistake: When the imperial officer is informing Kylo Ren that they were unable to find the droid, Kylo slowly turns his head around. In the next shot, from far away, red lighting has appeared on the left side of his mask. The shot cuts back to him and the red lighting on his mask has vanished.
Continuity mistake: During the escape from Jakku, the Millennium Falcon is battling two tie fighters and Finn's cannon gets stuck in the forward position. After Finn shoots down the 2nd tie fighter, he is shown celebrating. In the shot, Finn's cannon is no longer stuck in the forward position and is now pointing up.
Continuity mistake: While Finn, Rey, and BB-8 are hiding in the maintenance bay to unfix the poisonous gas, when Finn lifts the floor's slotted deck plate and pokes his head out there are specific grooves at the edge on top of the plate, but no grooves underneath at the edge. The problem occurs when Chewie lifts the deck plate, and those grooves should be on the side facing him (the top side), but instead they're facing out. Then when Han tells Finn "that thing" can understand him, the grooves are gone - the top side of the deck plate is properly facing out.
Continuity mistake: When Rey unloads the net filled with parts at Niima Outpost, as she picks up her staff to her right we see the black bag hanging on the side of the speeder (note the bag's straps are now much shorter than when she drove off on the speeder), but in the next shot as she continues to pick up her staff, which is now to her left, the black bag is suddenly gone from the speeder (when Rey pulls the net it looks as if the black bag is lying in the net with the parts, though she didn't put it in there), and the net is entirely unattached as well.
Continuity mistake: When Kylo Ren interrogates Rey, he removes his helmet and sets it down on a table of ashes. This table is not present in any of the wider shots of the interrogation room. [Director JJ Abrams has stated that the closeup of the ashes (the ashes of his victims, apparently) was actually from an earlier scene taking place in Kylo Ren's quarters on the star destroyer, which explains why the table is not visible in the Starkiller Base interrogation room. Still a mistake but there's the reason.]
Continuity mistake: After getting up from his crashed ejection seat, when Finn sees the smoke and runs toward it his shadow's directly behind him. Just as he reaches the crashed TIE fighter his shadow's in front of him to his left, but when he faces the front of the TIE fighter as it sinks into the sand, Finn's long shadow is still being cast in front of him, even though he's now facing the opposite way, then a thin long shadow is cast onto the sand in yet another direction, to the left of the exploding TIE fighter.
Continuity mistake: When Rey catches the light saber at the end the high side of the handle is facing outwards but when she turns it on the high side is now facing inwards.
Continuity mistake: When Finn asks Rey if she can unfix the poisonous gas they rush to get the air masks, and as Finn climbs down to the maintenance bay below deck we see the floor behind Rey when she starts to kneel to help BB-8. Then after the closeup of Rey helping BB-8, in the next shot as Finn takes BB-8 from Rey we see the corner of the floor's deck plate that has suddenly appeared behind Rey, which she reaches for in the following shot to cover the maintenance bay.
Continuity mistake: When Kylo Ren and Han Solo meet on the bridge in Solo's final scene, they both stop directly next to a red bridge light. As the shots change throughout the scene, Ren is shown standing even with the red light, behind the red light, and in front of the red light. Solo's position in relation to the red light near him changes several times as well.
Continuity mistake: When Finn, Rey, Han and Chewie are headed towards the oscillator, they stop running, seeing the battle between the Resistance and the First Order and Han says "They're in trouble. We can't leave." At this moment, the camera is behind the group and Han is standing next to Finn on Finn's right. The shot then cuts with the camera in front of them, and Han is suddenly standing in front of Finn. The camera cuts again and Han is now standing on Finn's left.
Continuity mistake: When we first meet Rey, she is scavenging Imperial wreckage, and she slides down the sand dune on a makeshift sled (she left her speeder at the base of the sand dune, which means she trudged up that massive dune). When she reaches the bottom of the dune, her speeder is casting a distinct, dark shadow on the sand. As she fires it up and rides away, the speeder suddenly casts no distinct shadow on the sand, even after she reaches her destination and parks it.
Factual error: In the opening sequence, the camera pans down on a planet and moon that are three-quarters lit in sunlight (with the sun being far off-camera to the left). A battlecruiser then crosses the images as a silhouette, eclipsing the planet and moon in total blackness. Impossible. The battlecruiser should have been lit three-quarters in sunlight, same as the planet and the moon. Stranger yet, as the stormtrooper shuttles are deployed and cross over the battlecruiser silhouette, the shuttles are illuminated.
Continuity mistake: When Rey is unloading her speeder bike the sun is setting, but when she goes to trade her gear it's bright and sunny, and when she goes home, in the long shot on her speeder bike the sun's setting again.
Continuity mistake: When Rey first meets BB-8 there are many footprints in the sand going towards it. When they walk back to the fallen AT-AT, the distance is far greater and Rey's footprints have disappeared.
Continuity mistake: When Finn retrieves the jacket from the downed TIE fighter he's standing right in front of it, but when it starts to sink he takes a couple of steps back, then the long shot shows him further away, and even further when it explodes.
Continuity mistake: After Rey's lightsaber battle with Kylo Ren, when the Falcon appears in the wideshot Rey's head is turned to look at the Falcon behind her, to her left, with Finn to her right, but in Rey's two closeups - before and after that wideshot, she's looking straight ahead at the Falcon, with Finn lying directly in front of her.
Continuity mistake: When the rathtars begin attacking, in a shot of Han looking down the corridor, one of the Kanjiklub members is running through a doorway whilst running from the rathtar. The camera cuts to a closer shot of them running from the rathtar, and the same Kanjiklub member can be seen running through the doorway a second time.
Continuity mistake: When Maz Kanata shows Finn, Han and Chewie the lightsaber, watch the blaster strap on Finn's shoulder. When Maz is saying "Take it. Find your friend," the strap is shown on his shoulder positioned at 2 o'clock. Finn then takes the lightsaber and the strap is suddenly closer to his neck. Then a couple of shots after, the strap is suddenly back to being positioned at 2 o'clock again.
Continuity mistake: When the falcon is caught in the tractor beam, in the shot after Finn says "it's the First Order," the shot cuts to Rey saying "What do we do? There must be something." There is a strand of hair on the right side of her head, and as the shot ends, the tip of the strand is pointing away downwards. In the next shot, the tip of the strand is suddenly curled up and closer to her neck.