A three-layered composite mover device constructed with both hydrogen storage La-Ni and compressive magnetostrictive Sm-Fe alloy thin films on each side surface of polyimide substrate has been prepared by using a flash vacuum evaporation and a direct current magnetron sputtering, respectively. When the motion strain is about -750 ppm at ±400 kA/m of magnetic field before hydrogenation, it is about -1150 ppm after hydrogenation. The hydrogenation of the La-Ni alloy film in the three-layered composite mover device enhances the magnetostriction.