A tie rod supporting part is provided in an area θ2 between a lateral line passing an inner side of a wheel and a king pin axis in a front view of the vehicle in a non-steering state. More specifically, the tie rod supporting part is arranged on the central side of the vehicle off the side of the wheel. The tie rod supporting part never interferes with the wheel and can be arranged near the central center of the wheel. As a result, a dimension in the height of the tie rod supporting part extending from the knuckle can be reduced and the knuckle can be miniaturized and lightened.