To obtain the high power mover device with high responsiveness, mover devices driven by hydrogen storage alloy film have been successfully developed. The effect of load on bending movement of LaNi 5 hydrogen storage alloy film deposited on thin copper substrate has been studied. The thin copper sheets, 10 mm in thickness, have been prepared by cold rolling. As a result, the power of the mover device is higher than that of the Ni Ti shape memory alloy commercially used.