Continuity mistake: When Cheryl is running through the woods, she is wearing slippers that stay on up until she reaches the cabin door. However, in following shots, she is shown barefoot, and when Ash opens the door her foot is dirty as if she'd been running barefoot the whole time. (00:28:05 - 00:29:10)
Continuity mistake: When Scotty honks, and the two guys on the side of the street wave their arms, the window of the car is suddenly open (it was closed before, as can be seen by the reflection) and then again is suddenly closed. (00:02:15)
Continuity mistake: The actors' haircuts change a few times. This is noticeable when Scotty pulls back the bath curtain, and his hair is rather long and thick, but when he turns around, his hair is much shorter. Also, Linda's hair is short and wavy, but when she turns evil and she and Ash are fighting outside, her hair is very curly. (00:41:20)
Continuity mistake: Evil Shelley wears red and white patterned socks as we see when Scotty pulls her out from the fireplace. Later when Scotty is dismembering her with the axe, he hits her ankles, and the socks are now all-red, thick, woolly socks which are longer in length too. (00:42:00 - 00:45:40)
Continuity mistake: The clock in living room of the cabin shows 5:52p (approx.) at the time it stops toward the beginning of the film. At the point that Scott is "re-animated" and attacks Ash in the climactic scene, it shows 3:10 until it restarts at the very end. This change is NOT accounted for by the clock running backwards as Ash is coming up from the cellar with the shotgun shells as the next shot of the clock shows it to again be at 5:52.
Continuity mistake: After the recently possessed Cheryl stabs Linda in the ankle with a pencil, she draws back her arm to attack again and her wrist is grabbed by Ash to prevent her from doing so. The shot of the stabbing shows the pencil to be covered with blood,but in the close-up of her being stopped by Ash, no blood on the pencil. The pencil is bloody again in the shot of Cheryl coming after Ash after having tossed him and Linda aside.
Continuity mistake: When the pipe bursts over him and spills out about a water tower's worth of blood, it covers him, completely soaked him and then when you look at him after the burst, he's cleaner than ever. (01:09:45)
Continuity mistake: When Cheryl is trying to get in the front door, and Ash is pushing against it, Cheryl manages to get her hand in the door. Ash hits it with the end of his gun, which gets blood all over the side of the door and the wall. But in the next shot, the blood has vanished. (01:08:30)
Continuity mistake: When Ash is burying his girlfriend, he cuts off her head, and he gets blood all over his face. He runs back to the house, and suddenly the blood is gone.
Continuity mistake: At one point in the movie, evil Cheryl thrusts her arms through the door, grabbing Ash, and creating two holes in the door. The size of these holes changes- compare them at the part where Ash is putting a bureau in front of the door (to keep Cheryl from getting in) to the part at the end where Ash is walking out of the cabin. (01:15:40 - 01:22:25)