Anachronisms: There is a bus (some say truck, some say car, some say motorbike) moving left to right in the far background in one of the opening shots. (The vehicle appears to have been digitally removed from the current DVD version, although it is still visible in the accompanying re-release trailer.)
Continuity: In the buildup to the climax, Shane rides up to Grafton's store, ties up his horse and steps up to the swing doors. We then see little Joey running toward the store and Shane has disappeared. It could be that he has already gone inside, except that in the next shot he is once again standing at the door.
Continuity: In the early scene at the saloon where Shane gets the drink spilled on him, his shirt is wet/dry/wet between shots.
Continuity: Shane clearly misses the third man in the showdown - he fires level instead of up at the balcony, but the next shot shows him almost standing and firing in the right direction. In the following shot he's crouching again.
Continuity: After Stonewall is gunned down by Jack Wilson, Swede is told to drag him out of the mud. Swede has clean clothes when told to do this. Before he approaches Stonewall's body, his clothes are all muddy, as if he had already dragged Stonewall out once already.
Continuity: As Shane rides to the climactic late night showdown (under a blue sky), his shadow alternates from his right side to his left.
Revealing mistakes: During his last impassioned speech Shane calls Joey "Jimmy".
Continuity: During the dinner, Marian keeps both hands on the table. But between cuts she appears with no hands on the table.
Continuity: After the dinner, Joey sits down in a rocking chair just behind Joe. In the subsequent shot Joey appears rocking the chair on Joe's right-hand side.
Continuity: When Shane starts to cut the stump, Joey is looking at him with his arms by his sides. In the following shot he has his left hand leaning on the house wall.
Continuity: In the barn, when Shane is lying and talking with Joey, he has his hands crossed on his belly, near his hat. Between shots his hands shift to the hat brim.
Continuity: When Shane enters the saloon the first time, a table on the left side of the screen has a bottle on it, between a little glass and a big one. Thereafter the bottle disappears and reappears from one shot to another.
Continuity: After the homesteaders arrive in town, Shane stands by out of the Grafton's store for a while. Then a woman approaches him from behind, right after a man. In the next shot the woman is replaced by a man.
Continuity: Shane takes the empty bottle from Joey, with his left hand, and pulls the swing door. Inside the saloon he appears holding the bottle with the right hand. Then he puts it on the counter, next his hand. Thereafter it disappears and reappears between cuts.
Continuity: When Joe and Shane are being cared for by Marian, she prepares a wet cloth and moves as if to put it on Shane's head, but in the next shot she is giving it to Joe.
Continuity: In the Independence Day party, three boys are on a roof while two men light fireworks. After the first explosion, the boys approach the eaves with their hands lowered. In the following shot they are with their hands covering their ears.
Continuity: When Shipstead appears pulling a horse with Torrey's body, Shane is beside a horse and changes his arm's position from one shot to another.
Continuity: At the end of the funeral, Joe sits down and talks to the homesteaders, with Shane and Marian behind him. Joey stays a little way behind them all, holding the dog on a rope. In the subsequent shot Shane and Joey appear side by side with Joe.
Continuity: When Joe and Shane are making an effort to root up the stump, Marian approaches and talks with Joe. Then Joe takes off his hands from the stump, but Shane does not. However, the next shot shows Shane with both his hands on his hips.
Continuity: At the funeral, the coffin is lowered below ground level, but then we see the dog put his paw on the coffin and the coffin is suddenly above ground level.
Anachronisms: After Shane gets in the barn carrying the saddle to set it by, a motorized vehicle drives left to right far on the outside. It appears just above Joey's head.
Errors made by characters (possibly deliberate errors by the filmmakers): When Shane is teaching Joey to shoot he says that the handle of the gun should be placed between the wrist (pointing to Joey's elbow) and the shoulder (pointing to Joey's wrist).
Continuity: Prior to Shane and Calloway's fight in the bar, In the Side and rear shots of Shane, Shane's left arm is in a straight position with the palm of his hand flat on the bar. From the front view of Shane the arm is bent and Shane is leaning on his elbow.
Anachronisms: At Grafton's Supply Store, Shane is flipping through "Sears and Roebuck Catalogue 112". Catalogue 112 is dated 1905; some 20 years after Shane takes place.
Continuity: The distance between Marian and Joe instantly changes from the distant shots and close-ups when Shane is leaving out the back gate at the beginning of the movie after the Rykers have left.