PURPOSE: To surely let sheet face following members follow a sheet face by just making contact with the sheet face by light pressure and prevent sheets from conveyed in the stacked state, etc., before happening by arranging the sheet face following members of a sheet face detection means adjacent to the end of the sheet materials in the width direction.

CONSTITUTION: A sheet material conveyance part comprising conveyance belts 4 having sheet material adsorption parts 3, air holes 4A, etc., and a blower 5 for adsorbing air under the conveyance belts 4 through the air holes 4A is arranged at the upper part of a load tray 1 loaded with a lot of sheet materials S. A nozzle for jetting air so as to surface the upper sheet material S is arranged adjacent to the tip of the loaded sheet materials S. In this case, a sheet face detection means 21 composed of a photosensor 21A and a sheet face following member 21B is provided adjacent to the rear end of a side regulation board 19 and the sheet face following member 21B is provided, and they contact with the sheet face by light pressure so that frictional force between the sheet materials S1, S2 is held small.