In a suspension for a vehicle including a pre-load adjustment mechanism, the pre-load adjustment mechanism includes a pre-load controller and an intermediate member, the pre-load controller being arranged at one end portion and receiving a spring, the intermediate member being sandwiched between the pre-load controller and the spring, the pre-load controller fits in an outer circumferential portion of the one end portion and is movable in the stroke direction by turning on a thread portion of the outer circumferential portion, the one end portion includes a long groove portion in the outer circumferential portion, the long groove portion extending in the stroke direction, the intermediate member has a ring-shape and is movable in the stroke direction, the outer circumferential portion being inserted to the ring-shape, and the intermediate member includes an engagement portion that engages with the long groove portion.