A vibration actuator , comprising: a fixing body including a hollow case and a coil disposed in the hollow case ; a movable body that includes a magnet disposed inside the coil in a radial direction of the coil , and is disposed to be freely movable in the hollow case in a vibration direction orthogonal to the radial direction; and an elastic supporting part that supports the movable body such that the movable body is freely movable with respect to the fixing body in the hollow case , wherein cooperation between the coil and the magnet causes the movable body to vibrate with respect to the fixing body , the elastic supporting part comprises an annular outer circumferential fixing portion , which is joined to fixing body , and an annular inner circumferential portion , which is joined to movable body , the hollow case restricts a movement range of the movable body in the hollow case by opposite end surface portions that are disposed to face each other at a distance from each other in the vibration direction of the movable body , characterized in that the opposite end surface portions include a plurality of vent holes respectively, the vent holes being formed in regions overlapping with an outer circumferential portion of the elastic supporting part in the vibration direction where the movable body does not collide with the opposite end surface portions when the movable body moves due to impact, a ratio of a total opening area of the vent holes in one of the opposite end surface portions to a surface area of the one of the opposite end surface portions is between 2% and 20%, and a ratio of a total opening area of the vent holes in another one of the opposite end surface portions to a surface area of the other one of the opposite end surface portions to a surface area of the other one of the opposite end surface portions is between 2% and 20%. a fixing body including a hollow case and a coil disposed in the hollow case ; a movable body that includes a magnet disposed inside the coil in a radial direction of the coil , and is disposed to be freely movable in the hollow case in a vibration direction orthogonal to the radial direction; and an elastic supporting part that supports the movable body such that the movable body is freely movable with respect to the fixing body in the hollow case , wherein cooperation between the coil and the magnet causes the movable body to vibrate with respect to the fixing body , the elastic supporting part comprises an annular outer circumferential fixing portion , which is joined to fixing body , and an annular inner circumferential portion , which is joined to movable body , the hollow case restricts a movement range of the movable body in the hollow case by opposite end surface portions that are disposed to face each other at a distance from each other in the vibration direction of the movable body , characterized in that the opposite end surface portions include a plurality of vent holes respectively, the vent holes being formed in regions overlapping with an outer circumferential portion of the elastic supporting part in the vibration direction where the movable body does not collide with the opposite end surface portions when the movable body moves due to impact, a ratio of a total opening area of the vent holes in one of the opposite end surface portions to a surface area of the one of the opposite end surface portions is between 2% and 20%, and a ratio of a total opening area of the vent holes in another one of the opposite end surface portions to a surface area of the other one of the opposite end surface portions to a surface area of the other one of the opposite end surface portions is between 2% and 20%. <EOS>