Thruster for propelling a watercraft

A thruster (1) for propelling a watercraft comprises at least one propeller (11, 12) on a rotatable propeller shaft (13, 14) and a motor (20) for driving the propeller shaft (13, 14) through a drive arrangement, particularly a drive arrangement comprising a rotatable drive shaft (31) and a coupling arrangement (32) arranged between the drive shaft (31) and an output shaft (22) of the motor (20) for coupling the drive shaft (31) to the output shaft (22) of the motor (20). The motor (20) is a permanent magnet motor, the stator body (21) of the motor (20) being provided with a recess (23) surrounding at least a part of the output shaft (22) of the motor (20), and the coupling arrangement (32) being at least partially located inside the recess (23) so that a 10 configuration having minimal constructional height is obtained.