An auto supplying device for a grinding machine is provided to grind a workpiece to be ground at various angle accurately. An auto supplying device for a grinding machine comprises a feed par(100) where a plurality of laminate guides(130) are formed like disc shape on the top end of a rotating plate(110); a front and rear column(200) formed longitudinally on the top end of a bed; an unloading device where a first clamp is formed; an unloading feeder(350) where a workpiece material is formed to be rest on the bottom end of a first clamp; a loading device where a first clamp gripping a workpiece material by a second cylinder; a loading feeder which is formed so that the work materials is put on the bottom of the second clamp; and an exhaust device formed in order to transfer a workpiece material along the vertical transfer guide(602) by a third cylinder(610).
