A coil spring (12) includes a wire (30) formed of spring steel shaped to be helical, and is compressed between an upper spring seat (13) and a lower spring seat (14). The coil spring (12) includes an upper portion (12a) and a lower portion (12b). A positive pitch winding end portion (31) is formed on the upper portion (12b) of the coil spring (12). A terminal-point-strong-abutting-portion (35) is formed at a distal end of the winding end portion (31). The terminal-point-strong-abutting-portion (35) is in contact with the upper spring seat (13) at one point at a position deviated to an inner side of a vehicle with respect to a coil central axis (X1). On the lower portion (12b) of the coil spring (12), an end turn portion (40) which contacts the lower spring seat (14) is formed at a position deviated to an outer side of the vehicle.