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Continuity mistake: Father Karras confronts Regan for the first time and just before she pukes on him fresh vomit appears on her night gown. Her eye makeup becomes darker and her hair is matted down also between shots. (01:25:35)

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Continuity mistake: Before she gets up from the table, Chris asks Det. Kinderman, "Would you like some more coffee?". His cup is obviously empty as she picks it up but if you look closely throughout this continuous scene, he's never touched it. (01:15:50)

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Continuity mistake: Chris walks with Damien after they meet on the bridge. As they talk she's smoking a cigarette, which she throws down and puts out with her foot. After she says, "How you go about getting an exorcism?" the cigarette is back in her right hand. (01:21:20)

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Continuity mistake: In the scene with the crucifix, Chris falls to the floor after Regan bashes her in the face. Look closely at the dresser that eventually comes sliding across the room at her. When we first see it, it's about half a foot to the right of the closet door on the left of the room, and is never touched or moved. When we see it again as it comes sliding across the room at Chris it's been moved to the left right up against the closet door. (01:19:10)

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Continuity mistake: Chris first meets Damien on a bridge as two other people walk in front of him. In the next shot they're behind him. (01:19:40)

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Continuity mistake: After she gets up from the table, Chris walks into the kitchen and we see an oil and vinegar tray on the lower level of the shelf above the cutting board. We see this spot before behind Det. Kinderman as he looks at his coffee, and the oil and vinegar tray are not there. (01:16:00)

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Continuity mistake: Det. Kinderman talks to Chris as they're having coffee in the kitchen and says, "My opinion, he was killed by a very powerful man" and her right hand appears by her face between shots. (01:14:20)

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Visible crew/equipment: After he stirs it, Det. Kinderman lifts the spoon out of his coffee as he starts to talk to Chris at the dinner table. A perfect reflection of the cameraman can be seen in the left of the spoon. (01:13:00)

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Continuity mistake: Chris interrogates Sharon and Willi about who put the cross under Regan's pillow, and Sharon goes from touching the phone with her left hand to holding a pad of paper between shots. (01:12:45)

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Continuity mistake: Father Karras says to Det. Kinderman, "It didn't happen in the fall?" And his right hand goes from holding the fence to being wrapped around the poll between shots. (01:05:30)

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Deliberate mistake: Det. Kinderman walks up the stairs where Burke Dennings fell to his death and looks up at Regan's window. This could not possibly be the outside of her window because when we see the room from the inside as Chris closes the window near the beginning of the movie, there's at least 6 to 8 feet between the window and corner of the house. Now when we see it as he looks up, the window is right at the corner of the house. (01:12:35)

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Continuity mistake: As Father Karras talks to Det. Kinderman by the tennis court fence, the towel around his neck goes from being longer on the right side to longer on the left between shots. (01:05:40)

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Continuity mistake: As they talk, Det. Kinderman describes how Burke Dennings was found, "with his head turned completely around, facing backwards". In the next shot they're standing in a different place. At first Father Karras has a shiny fence clamp on the right of his head than in the next shot it disappears. (01:05:20)

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Deliberate mistake: Det. Kinderman appears between shots sitting on the bleachers as Father Karras is out for his early morning jog around the track. (01:03:00)

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Continuity mistake: When Det. Kinderman meets Father Karras by the bleachers, Damien's collar is up. In the next shot it isn't. (01:04:00)

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Continuity mistake: As they walk, Det. Kinderman talks about Burke Dennings death and Father Karras says, " Only what I read in the papers". Father Karras goes from not holding the towel around his neck to holding it between shots. (01:04:15)

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Continuity mistake: The Psychiatrist hypnotizes Regan and the blanket on the chair behind her head is rearranged several times between shots. (01:01:50)

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Continuity mistake: The Psychiatrist that hypnotizes Regan is wearing a tie that in the close-ups, is retied differently as the scene progresses. (01:02:05)

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Continuity mistake: Chuck, the Assistant Director leaves after telling Chris and Sharon that Burke Dennings has been killed. In the next shot Chris' scarf is tied differently around the back of her neck. (01:00:30)

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Continuity mistake: Chuck, the Assistant Director comes in and tells Chris and Sharon that Burke Dennings has been killed. Chris turns around and says, "Heard what" and in a bad over-dub we see her mouth move as she says something else that is been edited out. (00:59:50)

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