Abstract: A four link suspension system for a monocoque vehicle body, which comprises a pair of upper control arms and a pair of lower control arms adapted to swingably support a rigid axle housing encasing an axle shaft against the body. The body has a floor panel, and a pair of side members spaced from each other in a transverse direction of the body, are provided at both sides of the panel. A cross member is disposed between both side members with a distance from the floor panel and secured at its both ends to the side members. The upper control arms are disposed inside of the lower control arms, and each forward end of the upper control arms is pivoted to said cross member.