Abstract: A phase-type focusing screen includes is made by using two photo masks each having a plurality of unit pattern regions regularly arrayed, each of which has a plurality of minute patterns of a predetermined shape and different size irregularly arrayed in such a way that three or more plane portions of different height are formed in the surface of a substrate, wherein the light beams passing through the combined minute patterns are given phase differences as they are diffracted or scattered. Thus, a desired diffusing characteristic is imparted into the focusing screen.