Continuity mistake: There are 5 different colours of blood used throughout the movie. Ash always gets soaked by blood (either chopping Linda's head up, or hacking Professor Noble to pieces), but always ends up dry in the next shot. [The reason why there are 5 types of blood: The creators wanted to get an R rating instead of NC-17, so they used different colors for slime instead of blood. It failed, they got an NC-17 rating and then released it independently with a non-rated rating.] (00:22:00 - 00:45:30)
Continuity mistake: When deadite Linda first pops up outside the window in front of Ash her hair is in a bun, but the view changes and her hair is down. (00:18:30)
Continuity mistake: During the movie, you can see that the metal handle of the chainsaw switches between being thin and thick. This is because they had replaced the handle half way through the shoot and had just painted the regular one silver and brown.
Continuity mistake: When Ash leaves the workshed after cutting up Linda he only locks the door to the workshed with the chain, later on he goes into it and unlocks the chain and the piece of wood. (00:22:20 - 01:06:20)
Continuity mistake: In one scene, Ash finds some pages from the Necronomicon lying in a mud puddle. He picks up the pages, and they're dry. (01:10:00)