Electric tweezers 1 includes a gripping member 13 for releasing/gripping an object, a base member 11 having an engagement portion to be engaged with the one end portion of the gripping member, a holder member 62 for fixedly coupling one end portion of the gripping member 13 and having a penetrating hollow cylindrical portion, a switch 57 for rotating and stopping a motor, a transformation mechanism 30 coupled with a shaft 52a of the motor 52 for transforming a rotation of the motor 52 in one direction into a quantity of translational displacement in a predetermined reciprocating direction with respect to the other end portion 13g of the gripping member, and an attaching section for attaching the base member 11 to a plurality of different positions relative to the holder member 62.