[Problem] To provide a vehicle suspension arm including components having simple shapes, being reasonably reduced in size and weight, and capable of being manufactured at low cost.[Solution] In formation of a lower arm 2 for vehicle suspension, an arm body 10 includes a pair of side plates 11 opposed to each other, a bottom plate 12 formed integrally to connect the side plates 11, and a spring receiving seat member 13 attached to the side plates 11, wherein the side plates 11 are arranged to extend within a lower surface area R of the spring receiving seat member 13.