Straddled electric vehicle

A straddled electric vehicle comprising:

• a motor;
• a driving wheel;
• and
• a power transmission mechanism including a plurality of shafts that transmit the driving power from the motor to the driving wheel;
• wherein
• the power transmission mechanism includes:
• a first shaft including spline gears on a shaft surface, the spline gears being inclined relative to an axial direction;
• a rotating member attached to the first shaft and including spline gears engageable with the spline gears on the first shaft, the rotating member being capable of exchanging a rotating force with the first shaft;
• and
• an elastic member capable of biasing one of the rotating member attached to the first shaft and the first shaft toward one axial direction;
• wherein
• the spline gears are inclined so as to move the rotating member or the first shaft toward the other axial direction when the driving wheel is rotating in a direction causing the straddled electric vehicle to advance and the rotating member or the first shaft works to maintain a speed of rotation of the driving wheel as the speed of rotation is decreasing.