To reduce the axial size of a twin-clutch device including first and second clutch actuating mechanisms arranged in parallel along the axes of first and second driven shafts that are coaxial. A first clutch disconnection/connection control mechanism is provided for switching disconnection/connection of the first clutch actuating mechanism. A second clutch disconnection/connection control mechanism is provided for switching disconnection/connection of the second clutch actuating mechanism. A second clutch disconnection/connection control mechanism is arranged between first and second clutch inners so that at least a part of the second clutch disconnection/connection control mechanism is accommodated in at least one of first and second cylinder portions.