Abstract: A mortising tool designed to remove a specific quantity of material from a wooden object, such as a door or door jamb, to allow flush mounting of door hinge plates. The tool is comprised of a mortise forming member, a cutting device attached to the lower surface of the mortise forming member, and a longitudinal slot formed through the mortise forming member. The cutting edge of the cutting device and the slot are in alignment. Upon placing the cutting device of the mortising tool to one side of the surface of an object from which a mortise is to be formed, material removal is effected by striking the rear portion of the mortising tool and directing it across the object. Material is removed by the cutting device as the mortising tool is directed across the object, and the slot facilitates waste material removal. The mortising tool is also provided with a shoulder which extends from the lower surface of the mortise forming member for controlling the distance the mortising tool travels when forming a mortise.