<p>[PROBLEMS] The polarization plate (40) having undergone conventional fullback cutting work by a milling machine has a multiplicity of parallel grooves (46) consisting of sharp ridges and furrows resulting from cutting of an end face by cutting edge. Depending upon temperature, microcracks (47) occur from the grooves (46) as starting points. [MEANS FOR SOLVING PROBLEMS] The end face of polarization plate (10) having undergone laser cutting consists of a substantially flat surface having only gentle microundulations (16) because the end face is once melted and then solidified. This surface has substantially no stress concentration zones being a trigger for microcracks, so that satisfactory inhibition of microcracks can be attained.</p>
