The object is to provide an actuator that moves in a shearing direction.
An actuator comprises an internal actuator including a first stator and a first mover opposed to the first stator, the first mover moving in a direction away from the first stator; a second stator having a fixation wall that is disposed in a direction in which the first stator and the first mover are opposed to each other and that is disposed along a first mover side and away from the first mover, the second stator being fixed with the first stator; and a second mover having a pressing wall inserted between the first mover and the fixation wall.