The cost of a light-emitting element matrix array is reduced by realizing the same function as that of a light-emitting thyristor by another element. A plurality of combined elements each constituted by a transistor and a light-emitting diode are arranged in line to form a matrix. The combined elements are divided into groups of n elements. The bases of the transistors of each group are connected to base selection lines, and the anodes of the light-emitting diodes of each group are connected to a common anode terminal.
