To provide a new hand-pushing feeder by which a blank is fed to a forming machine by guiding an end side to an inlet square by very light hand-pushing and striking an end side to the square when forming a seam, a flange of the same plate, etc. on the end side of the blank.

The feeder for feeding the blank to the roll forming machine by pushing it by hand when roll-forming a part to be worked such as the seam and the flange of the same-plate for assembling and connecting on the end side of the blank comprises guide rolls for guiding the blank to the side of the inlet square by pushing the blank by hand provided on the upside of a working bench provided on the inlet side of the roll forming machine and a plurality of lifting rolls for easily moving the blank provided on the underside of the working bench. In the hand-pushing feed of the blank in the roll forming machine, by feeding by pressing the entire length of the end side of the blank against the inlet square by pushing the blank by hand after inserting the blank between the guide rolls and the lifting rolls, the part to be worked such as the seam and the flange of the same plate are roll-formed without generating defective feeding of a large-size blank to a small-size blank.