To eliminate a state of inclining an automobile outside by centrifugal force in cornering, and to facilitate installation by reducing the number of part items by rationally constituting respective members on the basis of the principle of a screw.

This front suspension device is composed of a support member 11 integrally installed on a wheel support member so as to rotate together with the wheel support member 3, a rotary body case 15 integrally supported by this support member, a shock absorbing operation rod 17 having the lower end part side vertically movably fitted to and inserted into this rotary body case and having a nut member 18 in a projecting upper end part, a torque transmitting spring 19 wound on this shock absorbing operation rod, having a lower end part fixed to the upper end part side of the rotary body case and an upper end part fixed to the nut member side, and a bolt member 20 always threadedly engaging with the nut member rotating in the same direction as the wheel support member by force of the torque transmitting spring and fixed to a car body.