PURPOSE: To obtain a polyhedron solid with patterns drawn continuous on respective ridges by making a V-groove on a plane of a flat board to form a fold while printing on the other plane and folding the board an the fold so that the other plane is an external face.

CONSTITUTION: A V-groove 1 is made on a plane 11 of a flat board 2 and the groove 1 is made no be a fold C. For example, injecting molding of plastic is used to form the V-groove 1 at the same time as a main body, or the groove 1 is formed by mechanical cutting. A transfer sheet 3 is pressed against the other plane 12 of the board 2 no transfer patterns or the like to apply printing 4. Then the board is folded at the fold C so that the plane 12 with the print 4 applied is an external face to make a polyhedron-like solid R. Since the fold C is on the plane 11 of the board 2 while the print 4 is on the other plane 12, the print 4 is not discontinuous, thereby drawing continuous patterns, figures, symbols, etc.