PURPOSE: To reduce the vibration and noise of a camera by fitting a shutter unit which operates without being supplied with any external mechanical force to a camera body through buffer members.

CONSTITUTION: Two movable coils are incorporated in the shutter unit 3; and one movable coil is rotated clockwise and the other is rotated counterclockwise to put a shutter in operation. Then, the shutter unit is fitted to the shutter fitting part 2a of a mirror box 2 through bushes 4 and stepped screws 5 as the buffer members and the mirror box 2 is fixed to the camera body 1. Therefore, when the shutter operates and a curtain travels in the shutter unit 3, vibration transmitted from the shutter unit 3 to the mirror box 2 is attenuated and absorbed by the bushes 4, so the vibration of the shutter unit 3 is not transmitted to the camera body 1, so that no characteristic sound is generated.