An outboard motor comprising: an engine including a vertically extending crankshaft; a rope reel (15, 32) including a plate portion (15d, 32b) arranged to be rotatable about a rotational center axis of the crankshaft, and a rope winding portion (15f, 32e) provided integrally with the plate portion (15d, 32b) at a peripheral edge thereof, the rope winding portion (15f, 32e) arranged to be wound with a rope to start the engine; a transmitting member (16, 33) arranged to be rotatable about the rotational center axis of the crankshaft and to transmit rotation to the crankshaft; a force accumulation spiral spring (17, 34) disposed on an opposite side of the engine with respect to the plate portion (15d, 32b) of the rope reel (15, 32), and arranged to accumulate a torque applied to the rope reel (15, 32) and transmit the torque to the transmitting member (16, 33), first and second ends of the force accumulation spiral spring (17, 34) being fixed, respectively, to the rope reel (15, 32) and the transmitting member (16, 33); an engine cover arranged to cover the engine, the rope reel (15, 32), the transmitting member (16, 33), and the force accumulation spiral spring (17, 34); a fixed member (13, 31) fixed non-rotationally with respect to the engine; and a rewind spiral spring (18, 35) arranged to rewind the rope, first and second ends of the rewind spiral spring (18, 35) being fixed, respectively, to the rope reel (15, 32) and the fixed member (13, 31), characterized in that the rewind spiral spring (18, 35) is disposed on the opposite side of the engine with respect to the plate portion (15d, 32b) of the rope reel (15, 32). an engine including a vertically extending crankshaft; a rope reel (15, 32) including a plate portion (15d, 32b) arranged to be rotatable about a rotational center axis of the crankshaft, and a rope winding portion (15f, 32e) provided integrally with the plate portion (15d, 32b) at a peripheral edge thereof, the rope winding portion (15f, 32e) arranged to be wound with a rope to start the engine; a transmitting member (16, 33) arranged to be rotatable about the rotational center axis of the crankshaft and to transmit rotation to the crankshaft; a force accumulation spiral spring (17, 34) disposed on an opposite side of the engine with respect to the plate portion (15d, 32b) of the rope reel (15, 32), and arranged to accumulate a torque applied to the rope reel (15, 32) and transmit the torque to the transmitting member (16, 33), first and second ends of the force accumulation spiral spring (17, 34) being fixed, respectively, to the rope reel (15, 32) and the transmitting member (16, 33); an engine cover arranged to cover the engine, the rope reel (15, 32), the transmitting member (16, 33), and the force accumulation spiral spring (17, 34); a fixed member (13, 31) fixed non-rotationally with respect to the engine; and a rewind spiral spring (18, 35) arranged to rewind the rope, first and second ends of the rewind spiral spring (18, 35) being fixed, respectively, to the rope reel (15, 32) and the fixed member (13, 31), characterized in that the rewind spiral spring (18, 35) is disposed on the opposite side of the engine with respect to the plate portion (15d, 32b) of the rope reel (15, 32).