A McPherson-strut-type suspension comprising: a lower spring seat, an upper spring seat and a coil spring including a wire formed into a helical shape, and being arranged between the lower spring seat and the upper spring seat, the coil spring comprising: a lower end turn portion which is in contact with the lower spring seat; an upper end turn portion which is in contact with the upper spring seat; an effective portion of a cylindrical shape between the lower end turn portion and the upper end turn portion; and a force line, which is a straight line, connecting a center of force applied to the lower end turn portion and a center of force applied to the upper end turn portion in a state in which the force which compresses the effective portion is applied to the lower end turn portion and the upper end turn portion, wherein the lower end turn portion comprises a flat tapered shape first taper portion having a taper length and a taper thickness for controlling the force line, a thickness of the wire of the first taper portion is reduced in a tapered way for a first length from a thickness varying portion, which is provided at an intermediate portion of the lower end turn portion, toward a lower-end-side distal end of the wire along its length, and the thickness varying portion is arranged at a position close to a lower end of the force line, wherein in a free shape in which the coil spring is not compressed, the thickness varying portion is in contact with the lower spring seat and a lower surface of the first taper portion is separated from the lower spring seat, and in a state in which the coil spring is compressed, the lower surface of the first taper portion is in contact with the lower spring seat. a lower spring seat, an upper spring seat and a coil spring including a wire formed into a helical shape, and being arranged between the lower spring seat and the upper spring seat, the coil spring comprising: a lower end turn portion which is in contact with the lower spring seat; an upper end turn portion which is in contact with the upper spring seat; an effective portion of a cylindrical shape between the lower end turn portion and the upper end turn portion; and a force line, which is a straight line, connecting a center of force applied to the lower end turn portion and a center of force applied to the upper end turn portion in a state in which the force which compresses the effective portion is applied to the lower end turn portion and the upper end turn portion, wherein the lower end turn portion comprises a flat tapered shape first taper portion having a taper length and a taper thickness for controlling the force line, a thickness of the wire of the first taper portion is reduced in a tapered way for a first length from a thickness varying portion, which is provided at an intermediate portion of the lower end turn portion, toward a lower-end-side distal end of the wire along its length, and the thickness varying portion is arranged at a position close to a lower end of the force line, wherein in a free shape in which the coil spring is not compressed, the thickness varying portion is in contact with the lower spring seat and a lower surface of the first taper portion is separated from the lower spring seat, and in a state in which the coil spring is compressed, the lower surface of the first taper portion is in contact with the lower spring seat. a lower end turn portion which is in contact with the lower spring seat; an upper end turn portion which is in contact with the upper spring seat; an effective portion of a cylindrical shape between the lower end turn portion and the upper end turn portion; and a force line, which is a straight line, connecting a center of force applied to the lower end turn portion and a center of force applied to the upper end turn portion in a state in which the force which compresses the effective portion is applied to the lower end turn portion and the upper end turn portion, wherein the lower end turn portion comprises a flat tapered shape first taper portion having a taper length and a taper thickness for controlling the force line, a thickness of the wire of the first taper portion is reduced in a tapered way for a first length from a thickness varying portion, which is provided at an intermediate portion of the lower end turn portion, toward a lower-end-side distal end of the wire along its length, and the thickness varying portion is arranged at a position close to a lower end of the force line, wherein in a free shape in which the coil spring is not compressed, the thickness varying portion is in contact with the lower spring seat and a lower surface of the first taper portion is separated from the lower spring seat, and in a state in which the coil spring is compressed, the lower surface of the first taper portion is in contact with the lower spring seat.