To improve productivity and to reduce cost by facilitating switching whether a sheet is drawn near by one side or the sheet is drawn near by cooperation of both sides in the same direction and performing rapidly and surely positioning in the width direction of sheets with variety of widths.

A side gauge device 1 for a sheet-fed press is constituted in such a way that a slider 5 moving back and forth in the width direction of a sheet 19, a pair of cams 8a and 8b arranged in facing symmetrically with respect to a plane, an air cylinder 16 for a driving mechanism actuating the slider 5 through a guide roller 4 hooked on the curved faces of the cams 8a and 8b, etc., are provided and a compression spring 13 placed between the guide roller 4 and the air cylinder 16, etc., is arranged and the carrying direction of the sheet 19 can be changed by switching the direction of action of the compression spring 13 by means of the air cylinder 16, etc., and selecting the cams 8a and 8b on which the guide roller 4 is hooked.