To easily pull out a sheet-like material to the upstream side of this roller when the sheet-like material clogs on the downstream side of the roller since a pair of shaft members separate from each other by turning of its cam surface when a cam means rotates together with the shaft members supporting the roller.

When a rear end part of a film 10 is pulled to remove a clogged film 10, though a discharge roller 14a is rotated in the inverse direction of the carrying direction by frictional force between the film 10 and the discharge roller 14a, the discharge roller 14a rotates in the same direction in a condition of accompanying a shaft member 15a since it is supported with the shaft member 15a through a reverse rotation preventive mechanism 16. Since a cam surface 17a of a cam plate 17 is brought into contact with an outer peripheral surface of a shaft member 15b, the shaft member 15b moves along the cam surface 17a. Since this moving direction is the direction for separating from time shaft member 15a, the shaft members 15a and 15b move so as to separate from each other, and a clearance is formed between the discharge rollers 14a and 14b.