To provide a technique which can obtain excellent characteristics even in a case where there is a limitation on a capacity, and can reduce unnecessary vibration, in a speaker device.

A speaker device 10 comprises a first arm support part 22 and a second arm support part 23 which are rotatably formed with a center rotation part 20 as a center so as to rotate independently of each other. The first arm support part 22 and the second arm support part 23 are driven to rotate in mutually reverse directions. Therefore, reactions against movements of the first and second arm support parts 22, 23 are in directions to cancel out each other. Thus, a movement of a first speaker body 50a provided to the first arm support part 22 and a movement of a second speaker body 50b provided to the second arm support part 23 are in mutually reverse directions, thereby, action forces to a box 30 caused by driving of the first and second speaker bodies 50a, 50b are canceled out. As a result of above, the box 30 does not generate unnecessary vibration.