PURPOSE: To facilitate adjustment of the dislocation of the reference line of paper in a manually inserted tray arranged at the paper feed part of an electrographic copying machine from a sheet transport passage, and prevent the generation of interference at the time of storing it in a tray storage part.

CONSTITUTION: A fixed side stud member 21 and an adjustment side stud member 25 are disposed as the supporting shaft member of a manual insertion tray 10, and the manual insertion tray 10 is supported at the side of the body of a device such as an electrophotographic copying machine so as to open and close. If a dislocation occurs in the side registering surface R of the tray, the threaded part 27 of the adjustment side stud member 25 is advanced/retreated from/in the bracket 6 of the device body, so that the tray is moved in the axial direction, and the side registering surface R is adjusted so as to coincide with the reference line of the paper transport passage of the copying machine.