Visible crew/equipment: In the scene where Joe Gillis returns to the mansion, after Betty Schaefer has just revealed her love towards him, when he enters his room, you can see a hand wearing a watch in the mirror.

Continuity: Gillis is lying on his bed with the script pages all over the bed. Look closely and you'll see that they're all copies of the same page.

Continuity: When Joe awakens after his first night at Norma's mansion, his shirt is un-tucked as he puts on his jacket to go outside. When he is running down the stairs in the next shot, his shirt is tucked in.

Visible crew/equipment: Lightning equipment is reflected in Norma Desmond's glasses while she and Gillis are in the car, out on the road.

Continuity: When Gillis is seen floating in the pool, a photographer on the left kneels down twice to take the picture: First in the wide shot, and a second later in the closer shot.

Factual error: At the end of the movie, Joe Gillis is shot twice in the back and once in the chest before falling dead into a swimming pool. However, no blood from the wounds is ever seen in the pool, even after his body has been floating in it overnight.

Continuity: Desmond throws a bunch of papers tied up with a string at Gillis. Shot changes to him catching them and the bundle is totally different.

Continuity: Gillis steps out of the pool, dries himself and then Norma Desmond helps him dry again. When the shot changes, his face is totally wet again.

Continuity: When Gillis enters Schwab's pharmacy, the wide shot for the exterior shows a man and a woman on the left of the entrance. In inside shots they are gone. When Gillis steps outside, the prior exterior shot is used and the man and woman appear again.

Revealing: When Gillis parks his car in Desmond's garage the crew and the 3 stage lights are reflected on the car.

Visible crew/equipment: Lightning equipment is reflected in Norma Desmond's glasses when she is drying Gillis by the pool.