Abstract: A hinge mortise cutter apparatus is adapted for cutting a hinge mortise into an edge of a door and includes a mortise outline cutter assembly which is placed on the edge of the door for cutting the mortise outline in the edge of the door. After the mortise outline is cut into the edge of the door, the mortise outline cutter assembly is removed from the door. The mortise outline has a predetermined length. Then, a screw-controlled mortise cutter assembly is placed over the mortise outline on the edge of the door and over a portion of two sides of the door adjacent to the edge, wherein a portion of the screw-controlled mortise cutter assembly is placed in registration with the mortise outline. Then, a screw-controlled blade assembly is advanced in a plane parallel to the edge below the edge so that a blade edge, which is part of the screw-controlled blade assembly, cuts out a mortise from the edge of the door.