A vibration actuator, comprising: a movable body that centrally includes a magnet having a columnar shape and in which spring retaining parts (22, 24) are disposed respectively on front and back surfaces of the magnet in an axial direction of the magnet; a fixing body for accommodating the movable body, the fixing body having a cylindrical shape and including a pair of annular coils (61, 62) disposed radially outside of the movable body; a pair of elastic supporting parts (81, 82) for supporting the movable body such that the movable body is capable of reciprocating vibration in a vibration direction along the axial direction, each of the elastic supporting parts (81, 82) being joined to the fixing body at an outer circumferential portion and being joined to a corresponding one of the spring retaining parts (22,24) at an inner circumferential portion; characterised in that the vibration actuator further comprises a sealing part that is disposed at a joint portion between the inner circumferential portion and the movable body and that seals the joint portion, wherein the spring retaining parts (22, 24) include recess forming portions continuous with a joining surface (224a, 244a) with the inner circumferential portions, the inner circumferential portion has a recessed portion which is cut out on an outer circumference of the inner circumferential portion in the circumferential direction and located on the joining surface (224a, 244), and the sealing part is capable of connecting and sealing the recessed portion and the recess forming portion in communication with each other, and seals the joint portion. a movable body that centrally includes a magnet having a columnar shape and in which spring retaining parts (22, 24) are disposed respectively on front and back surfaces of the magnet in an axial direction of the magnet; a fixing body for accommodating the movable body, the fixing body having a cylindrical shape and including a pair of annular coils (61, 62) disposed radially outside of the movable body; a pair of elastic supporting parts (81, 82) for supporting the movable body such that the movable body is capable of reciprocating vibration in a vibration direction along the axial direction, each of the elastic supporting parts (81, 82) being joined to the fixing body at an outer circumferential portion and being joined to a corresponding one of the spring retaining parts (22,24) at an inner circumferential portion; characterised in that the vibration actuator further comprises a sealing part that is disposed at a joint portion between the inner circumferential portion and the movable body and that seals the joint portion, wherein the spring retaining parts (22, 24) include recess forming portions continuous with a joining surface (224a, 244a) with the inner circumferential portions, the inner circumferential portion has a recessed portion which is cut out on an outer circumference of the inner circumferential portion in the circumferential direction and located on the joining surface (224a, 244), and the sealing part is capable of connecting and sealing the recessed portion and the recess forming portion in communication with each other, and seals the joint portion.