Other mistake: When Hilts and Ives are taken down to the cooler for the very first time, just after arriving at the camp, watch the wall as the door is closed by the guard behind Ives - it very obviously moves as the door slams shut.
Continuity mistake: In the end of the movie, Hilts (Steve McQueen) is returned to the camp - he is dirty and his shirt is torn. When he enters the cooler, after being tossed his baseball glove, he is clean and his shirt is no longer torn.
Continuity mistake: When Roger is in the van talking to Macdonald, his face is deliberately dirty and stubbled - but when they are about to shoot him, he is clean-shaven. similarly with his bruises which seem to magically disappear by the evening of the first day.
Character mistake: When Sedgwick is bringing the cement tunnel lid to Willy, somebody yells out "Hey Hendley" and Sedgwick answers "Hello boys". He was called by the wrong name.
Factual error: When McQueen steals the motorbike from the German soldiers and rides off it is clearly a Triumph, a British make, not a BMW or Zundapp which was what the German army used. More to the point it looks like a 1960s model.
Visible crew/equipment: Late in the film, when the two escapees are boarding a bus, there's a studio lamp on a scissor-lift in plain sight at the left side of the screen.
Continuity mistake: In the scene where Ives attempts to climb over the barbed wire fence, a long shot shows Ives in foreground and a line of men, including Hilts, in the background. In this shot, Hilts notices Ives and begins to run towards him. In the next shot, a close up of the line, we see Hilts still standing motionless, before noticing Ives and beginning to run towards him. Again.
Continuity mistake: When Hendley and Blythe emergency-land their plane, it dashes into a copse. Both wings are cut off by trees and stay behind, while the fuselage runs on for several meters, finally coming to a halt with the tail facing down and the cockpit up. Next shot (pilots exiting the plane), the crash site looks very different: The tail now points into the air, cockpit down. And even worse, the wings have returned to the plane, I mean they are still cut off, but now positioned neatly on both sides of the fuselage instead of all those meters behind where you'd expect them.
Continuity mistake: Check out the memorable scene when Hendley and Blythe, trying to reach Switzerland in a stolen training aircraft, fly over marvellous Castle Neuschwanstein. According to Hendley, they've almost made it, just 20 minutes of flight and one mountain range left to cross. This is quite funny because the Neuschwanstein shot reveals that they're actually flying straight in the wrong direction. The camera faces south, the plane moves from right to left, meaning they're heading east, straight away from the Swiss border which is just 50 kilometers west of the famous castle.
Continuity mistake: When Bartlett is on the run in the town a car containing Germans pulls up near him. Bartlett stops on the pavement but in the next shot he is standing in the middle of the road.
Visible crew/equipment: In the scene where everyone is lining up to receive the moonshine that the Americans made you can see a crew member on the left hand side. He is wearing a red baseball cap and modern clothes. He is motioning for the extras to go into the main shot to get the alcohol. (Widescreen edition).
Visible crew/equipment: The first time Hilts (Steve McQueen) is locked up, you can clearly see the edge of the wall, and to the left a stage hand moving.
Continuity mistake: In the scene where Steve McQueen is pulling wire across the road, and attaching the end to the pole to trip up the motorcycle rider you can clearly see two shadows on the ground of Steve in opposite directions due to the camera lights.
Character mistake: When Werner goes to see Hedley for helping finding his "lost" papers, Hedley is playing chess. The chess set is set up incorrectly. When the men are set up properly, each player has a light colored square in the right-hand corner. In the movie, the game is set up so that the light-colored square is in each player's left-hand corner. This "beginner" mistake puts the king and queen in the wrong positions.
Factual error: An essential part of the escape plan is the obtaining of a still camera to take photographs of the camp boundary fences, enabling accurate measurements to be made. What are they going to use the camera for? A paperweight? First, how do they obtain 35mm film for the camera? In the late stages of World War 2 film would be almost unobtainable for a well-heeled civilian. A prisoner of war? No chance. Even if they did do so, how would they develop and print the film? They'd require a working darkroom - where? - with developing fluid, fixer, a lot of running water, photographic paper, the tubs necessary for all of these processes, and a photographic enlarger which is a complex piece of equipment. We see none of this gear and in a prisoner of war camp in Poland in the latter part of World War 2, we aren't going to, either.