Quadrilateral-type front suspension for a steerable wheel of a motor-vehicle, comprising: - a wheel support (K), - an upper oscillating arm (UA), having one end articulated to the wheel support (K) by means of a first joint and an opposite end articulated to the motor-vehicle structure (B) by means of at least one second joint , - a lower oscillating arm (LA), having one end articulated to the wheel support (K) by means of a first joint and an opposite end articulated to the motor-vehicle structure by means of at least one second joint , - a spring-shock absorber unit operatively interposed between said suspension and the structure (B) of the motor-vehicle, and - an anti-roll bar (TB) mounted on the structure (B) of the motor-vehicle along a transverse axis with respect to the longitudinal direction of the motor-vehicle, and having an end arm operatively connected to said suspension, - each of said upper and lower oscillating arms (UA, LA) being in the form of a single oscillating arm or being defined by two independent oscillating rods each articulated at one end to the wheel support and at the opposite end to the structure (B) of the motor-vehicle, wherein the aforesaid spring-shock absorber unit is operatively connected to said suspension by means of a connection to said wheel support (K), wherein said spring-shock absorber unit is connected to said wheel support (K) at a connecting point lying substantially on the steering axis of the wheel support (K) or adjacent to it, wherein the spring-shock absorber unit is connected to the wheel support (K) by means of an articulated joint (32;36;40), and wherein an anti-rotation device (35; 37; 40) is associated with the connection between the spring-shock absorber unit and the suspension, to prevent or limit a relative rotation between the spring-shock absorber unit and the wheel support (K), said suspension being characterized in that said anti-rotation device (35; 37; 40) is associated with the connection between the spring-shock absorber unit and the wheel support (K), the anti-rotation device comprising an additional element (35; 37; 40) connecting the spring-shock absorber unit to the wheel support (K). - a wheel support (K), - an upper oscillating arm (UA), having one end articulated to the wheel support (K) by means of a first joint and an opposite end articulated to the motor-vehicle structure (B) by means of at least one second joint , - a lower oscillating arm (LA), having one end articulated to the wheel support (K) by means of a first joint and an opposite end articulated to the motor-vehicle structure by means of at least one second joint , - a spring-shock absorber unit operatively interposed between said suspension and the structure (B) of the motor-vehicle, and - an anti-roll bar (TB) mounted on the structure (B) of the motor-vehicle along a transverse axis with respect to the longitudinal direction of the motor-vehicle, and having an end arm operatively connected to said suspension, - each of said upper and lower oscillating arms (UA, LA) being in the form of a single oscillating arm or being defined by two independent oscillating rods each articulated at one end to the wheel support and at the opposite end to the structure (B) of the motor-vehicle, <EOS>