To provide a displacement amount increasing system for increasing displacement amount of a micro-actuating element.

Power generated by a power generating part 21 to head in one direction is transmitted to a target 24 which is a body to be driven via first and second power transmitting parts 22 and 23. Since hinge parts 20a, 20c, 20e are respectively provided between the power generating part 21, the first power transmitting part 22, the second power transmitting part 23 and the target 24, power transmitted through each part is transmitted to the target 24, while being amplified by leverage. By this, the target 24 is displaced at an amount larger than the displacement amount by the power of the power generating part 21.