Abstract: A propeller device for a ship rotates 360.degree. and may be raised when it is not in use. The transmission system of the propeller device includes a drive shaft for the propeller device, which is placed in the upper part of such propeller device. The shaft is driven by the shaft of the engine and transmits rotation via an upper angular gearbox to a vertical shaft and a lower angular gearbox to a propeller shaft at the bottom part of the propeller device. A coupling is fitted between the drive shaft of the propeller device and the engine shaft rotating same. A coupling member of the coupling permits the propeller device to be uncoupled from the engine and to be displaced in the axial direction, so that the propeller device may be raised.