Vibration actuator and electronic device

A vibration actuator, comprising:

• a movable body that centrally includes a magnet having a columnar shape and in which spring retaining parts 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 disposed radially outside of the movable body;
• a pair of elastic supporting parts 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 being joined to the fixing body at an outer circumferential portion and being joined to a corresponding one of the spring retaining parts at an inner circumferential portion;
• and
• 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 include recess forming portions continuous with a joining surface with the inner circumferential portions and having a flat bottom,
• 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, and
• the sealing part is capable of connecting and sealing the recessed portion and the recess forming portion (25) in communication with each other, and seals the joint portion.