STRADDLED ELECTRIC VEHICLE

A straddled electric vehicle (10) includes a power transmission mechanism (40) for transmitting the driving power from the motor (32) to the rear wheel (11 R). The power transmission mechanism (40) includes: a rear wheel shaft (42) having spline grooves (421) on its shaft surface, the spline grooves (421) being inclined relative to an axial direction; a second gear (44) having spline grooves (441) engageable with the spline grooves (421), the second gear (44) capable of exchanging a rotating force with the rear wheel shaft (42); and an elastic member (51) capable of biasing the second gear (44) attached to the rear wheel shaft (42) to the right. The spline grooves (421) and (441) are inclined so as to move the second gear (44) to the left when the rear wheel (11 R) is rotating in the direction causing the straddled electric vehicle 10 to advance and the second gear (44) works to maintain the speed of rotation of the rear wheel (11R) as the speed of rotation is decreasing.