A power transmission mechanism including a planetary mechanism, an electronically controlled clutch, and a motor generator. The planetary mechanism is coupled to an input shaft and first and second output shafts. The planetary mechanism includes a differential element rotating the first and second output shafts at different rotation speeds. The planetary mechanism outputs a torque input to the first and second output shafts. The electronically controlled clutch includes first and second clutch plates. The first clutch plate is coupled to a member different from the differential element. The second clutch plate is coupled to the differential element. The electronically controlled clutch allows the differential element to rotate the first and second output shafts at the different rotation speeds when the first and second clutch plates are released. The electronically controlled clutch restricts a rotation speed difference in response to engaging between the first and second clutch plates.