A straddled vehicle comprising: a seat; a body frame including a left seat frame and a right seat frame that support the seat; a storage box disposed below the seat, the storage box being disposed between the left seat frame and the right seat frame in a vehicle width direction; an engine unit swingably supported by the body frame, the engine unit including an engine unit disposed below the storage box, a transmission mechanism that transmits a power of the engine unit, and a rear wheel that rotates by the power from the transmission mechanism; a motor generator having a starter motor function for starting the engine unit and a power generation function for generating an electricity by being driven by the engine unit; and a motor driver configured to control the motor generator, wherein the storage box includes a first storage portion including a first bottom wall and a first rear wall extending upward from the first bottom wall, the first storage portion being configured to store a helmet, and characterised in that a second storage portion disposed behind the first storage portion, the second storage portion including a second bottom wall extending rearward from an upper portion of the first rear wall, the motor driver is at least partially located below the second bottom wall, in a vehicle plan view, the motor driver at least partially overlaps with the second storage portion, the motor driver is disposed to be inclined forward and downward so that a front end of the motor driver is located lower than a rear end of the motor driver, as seen in a vehicle side view, a forward extension line of an axis of the motor driver overlaps with the first storage portion, in the vehicle width direction, the motor driver is disposed between the left seat frame and the right seat frame, and as seen in the vehicle side view, the motor driver at least partially overlaps the left seat frame or the right seat frame. a seat; a body frame including a left seat frame and a right seat frame that support the seat; a storage box disposed below the seat, the storage box being disposed between the left seat frame and the right seat frame in a vehicle width direction; an engine unit swingably supported by the body frame, the engine unit including an engine unit disposed below the storage box, a transmission mechanism that transmits a power of the engine unit, and a rear wheel that rotates by the power from the transmission mechanism; an engine unit disposed below the storage box, a transmission mechanism that transmits a power of the engine unit, and a rear wheel that rotates by the power from the transmission mechanism; a motor generator having a starter motor function for starting the engine unit and a power generation function for generating an electricity by being driven by the engine unit; and a motor driver configured to control the motor generator, wherein the storage box includes a first storage portion including a first bottom wall and a first rear wall extending upward from the first bottom wall, the first storage portion being configured to store a helmet, and characterised in that a second storage portion disposed behind the first storage portion, the second storage portion including a second bottom wall extending rearward from an upper portion of the first rear wall, a first storage portion including a first bottom wall and a first rear wall extending upward from the first bottom wall, the first storage portion being configured to store a helmet, and characterised in that a second storage portion disposed behind the first storage portion, the second storage portion including a second bottom wall extending rearward from an upper portion of the first rear wall, the motor driver is at least partially located below the second bottom wall, in a vehicle plan view, the motor driver at least partially overlaps with the second storage portion, the motor driver is disposed to be inclined forward and downward so that a front end of the motor driver is located lower than a rear end of the motor driver, as seen in a vehicle side view, a forward extension line of an axis of the motor driver overlaps with the first storage portion, in the vehicle width direction, the motor driver is disposed between the left seat frame and the right seat frame, and as seen in the vehicle side view, the motor driver at least partially overlaps the left seat frame or the right seat frame.