Abstract: A method of manufacturing a pneumatic tire according to the present invention can improve productivity. A steel cord S is continuously shaped in a helical manner or in a manner of a two-dimensional wave with at least one of amplitude and pitch of shaping of the steel cord varying in a phased manner or in a continuous manner just before winding of the steel cord S around a belt-forming drum 4. Then, the shaped steel cord S? is continuously wound around the rotating belt-forming drum 4 spirally in the circumferential direction of the drum in such a manner that the circumferential stiffness of a belt-reinforcing layer 16 varies in the widthwise direction of the tire.