A linear actuator comprising: a stator, a first movable element and a second movable element, wherein the stator includes an electromagnet comprising a core including three teeth wherein a winding is wound around the middle tooth, and each of the movable elements includes a permanent magnet; an output shaft, configured to be connected to a brush attachment and extending along a center axis and arranged on an end of the first movable element, wherein the output shaft has an axial direction in a reciprocation direction of the movable elements (20a, 20b), wherein the reciprocation direction is along the center axis orthogonal to a coil axis of the winding; and a holding member, including an electromagnetic block accommodation portion and magnetic block accommodation portions (42a, 42b) which accommodate the electromagnet and the two movable elements (20a, 20b) respectively, configured to hold the stator and the two movable elements (20a, 20b) in such a manner that the movable elements (20a, 20b) are arranged in parallel with each other in a direction orthogonal to a reciprocation direction of the movable elements (20a, 20b), wherein the holding member holds the stator and the plurality of movable elements (20a, 20b) in such a manner that the permanent magnet and the teeth of the core of the electromagnet face each other with a gap in between, and the holding member includes opposing plate springs (43a, 43b) that hold the electromagnet and the permanent magnet so that the electromagnet and the permanent magnet face each other with the gap in between, and the direction of the permanent magnet is set so that the first and second movable elements (20a, 20b) reciprocate in the reciprocation direction in opposite phases when the electromagnet is supplied with current; wherein the linear actuator is characterized by a weight (60, 61, 62) connected to the second movable element, wherein the weight is arranged to partially or entirely face a side portion of the linear actuator in a direction orthogonal to the reciprocation direction, and the weight and the output shaft are reciprocated in opposite phases when the electromagnet is supplied with current; and an L-shaped connection member (50; 31) that couples the output shaft and the first movable element, and is configured to arrange the output shaft in a central portion of the linear actuator on a plane orthogonal to the reciprocation direction. a stator, a first movable element and a second movable element, wherein the stator includes an electromagnet comprising a core including three teeth wherein a winding is wound around the middle tooth, and each of the movable elements includes a permanent magnet; an output shaft, configured to be connected to a brush attachment and extending along a center axis and arranged on an end of the first movable element, wherein the output shaft has an axial direction in a reciprocation direction of the movable elements (20a, 20b), wherein the reciprocation direction is along the center axis orthogonal to a coil axis of the winding; and a holding member, including an electromagnetic block accommodation portion and magnetic block accommodation portions (42a, 42b) which accommodate the electromagnet and the two movable elements (20a, 20b) respectively, configured to hold the stator and the two movable elements (20a, 20b) in such a manner that the movable elements (20a, 20b) are arranged in parallel with each other in a direction orthogonal to a reciprocation direction of the movable elements (20a, 20b), wherein the holding member holds the stator and the plurality of movable elements (20a, 20b) in such a manner that the permanent magnet and the teeth of the core of the electromagnet face each other with a gap in between, and the holding member includes opposing plate springs (43a, 43b) that hold the electromagnet and the permanent magnet so that the electromagnet and the permanent magnet face each other with the gap in between, and the direction of the permanent magnet is set so that the first and second movable elements (20a, 20b) reciprocate in the reciprocation direction in opposite phases when the electromagnet is supplied with current; wherein the linear actuator is characterized by a weight (60, 61, 62) connected to the second movable element, wherein the weight is arranged to partially or entirely face a side portion of the linear actuator in a direction orthogonal to the reciprocation direction, and the weight and the output shaft are reciprocated in opposite phases when the electromagnet is supplied with current; and an L-shaped connection member (50; 31) that couples the output shaft and the first movable element, and is configured to arrange the output shaft in a central portion of the linear actuator on a plane orthogonal to the reciprocation direction.