Abstract: This invention relates to marine propulsive devices, wherein the propeller drive shaft is dismantled outwards. The herein-proposed marine propulsive device comprises a propeller drive shaft carrying at one end a screw propeller that has a hub with radial holes to hold the propeller blade roots, the propeller hub being made as a sleeve fitted onto the propeller drive shaft extension in such a manner that a free space is defined between an end portion of the sleeve and the butt end of the propeller drive shaft, the space being communicated with the hub outside surface and adapted for feeding a liquid under pressure thereinto in the course of hub dismantling; each of the radial holes in the screw propeller hub is open-ended, and a socket coaxial with its respective hole is provided in the propeller drive shaft, the socket being adapted for holding the end of the propeller blade root.