To improve assemblage while surely supporting a lower arm with the connecting position of the lower arm placed immediately under a knuckle body in a front suspension device.

The knuckle body 3 rotatably supporting a front wheel is provided with a pair of leg parts 9 and 10 forked into front/rear and extending downward. A knuckle bottom bracket 13 connected to the leg parts 9 and 10 from the lower part is disposed with a first and second through-holes 14 and 15. The lower arm 22 extending in the car width direction is supported to a lower arm support part 21 between the first and second through-holes 14 and 15 with the lower face of its car width-directional outside end 22a abutting thereon.