Groove-type paper scoring apparatus according to the invention comprises a platform providing a planar rectangular work surface. On the platform are a series of transversely spaced shallow score channels extending longitudinally from one end of the platform to the other. Shallow boundary walls extend along the side edges and the distal end of the platform. The distal end wall of the platform is provided with spaced vertical notches each mating with an associated one of the series of score channels. A scale or ruler extends along each of the walls.