The micro-lens array in which a plural of convexly-protruded micro-lens
are closely arranged two-dimensionally and a plural of convex sub-lenses
having a curvature-radius smaller than that of the micro-lens are
protrusively formed on the surface of each micro-lens has a large view
angle, since D.sub.sav/D is in a range from 0.1 to 0.3 where D is the
micro-lens bottom face width obtained by halving the summation of the
maximum and the minimum width which are measured along the line passing
through the center of the bottom face of the micro-lens; D.sub.s is the
sub-lens bottom face width obtained by halving the summation of the
maximum and the minimum width which are measured along the line passing
through the center of the bottom face of the sub-lens; and D.sub.sav is
the average sub-lens bottom face width obtained by averaging a plural of
the sub-lens bottom face widths D.sub.s.