Continuity mistake: In the first few scenes in the lobby of the Contention City Hotel, the clock is silent. In later scenes, it is ticking quite loudly.
Continuity mistake: The sheriff wears his badge over his left side, which is traditional. As he is approaching on horse in the final scene of the movie it is still on his left side. Then for a few seconds in one shot his badge is on the right. (01:23:10)
Continuity mistake: At the start of the movie the train pulls into town. The loco, tender and 2 stock wagons pass the water tower, but the next shot shows the loco still alongside the water tower.
Continuity mistake: In the scene where Jack Boundurant is getting threatened/punched by Charlie Rakes inside the home of Cricket Pate: Rakes is holding Boundurant and severely damaging a single side of his face. In the next scene Boundurant appears with his brothers and the wound appears on the other side of his face.
Continuity mistake: When Bob Hope is tied to the raised barber chair you can tell it is his stunt double in the far away shots because of the way his hair changes.
Continuity mistake: When Solara hijacks the SUV after leaving George and Martha's, there are mountains that disappear from shot to shot. Right after Carnegie yells "Go back," you can see mountains in front of them. When Solara gets out and looks at them turning around, those mountains are gone. After she grabs the grenade and stands in the middle of the road, they are back. When she throws the grenade and Carnegie's vehicle swerves out of the way, the mountains are gone again. (01:27:30)
Continuity mistake: During the first gunfight between The Gunslinger (Yul Brynner) and Peter (Richard Benjamin), The Gunslinger is seen being shot in the middle of the body from the back. But, when you see him a second or two later, the shot is well over on his right side.
Continuity mistake: In the scene where we see school children leaving the building and are going home we see two children go over to the see saw to ride on it. Buffalo Bill is talking to a little girl just outside the doorway and when it cuts in for a closer shot of the girl, you can see in the background there are now four children on the see saw; then again when the little girl starts walking home its back to the original two children who were on the see saw earlier on.
Continuity mistake: When we see Nasty Canasta's drink, you can see there are holes on the counter next to the glass when the bartender puts two ice cubes in it. When Daffy Duck dares Nasty Canasta to drink it, the holes have disappeared.
Continuity mistake: When rescuing Burt Lancaster whilst tied upside down in the canyon, watch the two bandits behind Lee Marvin when he jumps down, as they retrieve the rifles stood up against the rocks twice.
Continuity mistake: In the scene where the wagon train is waiting for Wagonmaster Harlow to decide which fork in the road to take, all the shadows are to the left. As they approach Harlow, the shadows are in front and moment later when the wagons move off the shadows are to the right. (00:26:20)
Continuity mistake: When Oracle Jones is first sought out by the miners he drinks whiskey from a glass. As his visions grow he reaches for the whole bottle, and grabs the top to remove the cork; but the cork has already been removed.
Continuity mistake: When Cole and the halfbreed duel with knives, the fabric they hold in their mouths as a tether keeps flipping over, meaning the end of the cloth hangs out the left side of the mouth, then the right, and left again - several times for both actors - even tho the fight is continuous and they make no moves that would change this.
Continuity mistake: When Johanna and the Captain are being chased by Mr Almay and his associates, their position in the wagon changes. First Johanna is on the Captain's left. Next shot she is on his right. Next shot she is back on his left. (00:42:14)
Continuity mistake: When they fully cut off the right ear of one of the general's men and stuck it in his mouth, as he walked away, they shot him in the back. As he is falling to the ground, you can see his ear is still attached to his head. (00:42:45 - 00:43:15)
Continuity mistake: Aguilar is restless during the party, and he picks a tarot card from the table, which turns out to be Death arcane. In close-up the card is held by a single hand, but Frank Wolff is holding the card between both hands both before and after that shot. (00:42:20)
Continuity mistake: A shoulder wound Raquel Welch has becomes a graze to the upper arm in the next scene.
Continuity mistake: While pointing his pistol at Matt Diggs, the Rabbi cocks the pistol's hammer. A split second later from another angle, the pistol's hammer is down.
Continuity mistake: Throughout the stagecoach scene (when Silence meets the Sheriff and Loco) the number of horses attached to the back of the coach changes a number of times. Sometimes there is one horse, sometimes two. (00:25:44)
Continuity mistake: Right before and during the ending shootout, the sky changes a few times, as does the sun angle.