The disclosure provides a steering knuckle, which has good rigidity and reliability. The steering knuckle includes: a wheel support portion for supporting a wheel; a damper support portion for supporting a damper; and an arm portion for connecting the wheel support portion and the damper support portion. The damper support portion is cylindrical and has a mounting hole through which the damper is inserted, and the arm portion includes a pair of side walls connecting the damper support portion and the wheel support portion and a bottom wall connected between the side walls, and the bottom wall is connected with the side walls at the middle portion in the vertical direction of the side walls.