To provide a suspension arm for a vehicle capable of being press-molded at low cost, and is excellent in stiffness.

The sectional form of a suspension arm main body 1 formed by press-molding a steel plate has a plate-like main part 13 and reinforcing parts 12 formed by bending the rim of the main 13 into a pipe shape. Although the load from a wheel acts in an input surface parallel to the main 13, the geometrical moment of inertia related to an axis L2 is sufficiently increased by the presence of the reinforcing parts 12 placed apart from the axis L2, and the suspension arm body 1 exhibits the sufficient stiffness in relation to the bending load. Since the arm can be press-molded, it is excellent in productivity in comparison with a forging, and it can lower costs.