A method of manufacturing a pneumatic tire, comprising the steps of: forming a green tire by sequentially layering tire components (M1-M5) comprising a reinforcing wire on an outer surface of a forming drum while continuously disposing the reinforcing wire extended in a drum width direction on an outer surface of a rubber member disposed on the outer surface of the forming drum in a drum circumferential direction; and vulcanizing the green tire, the forming comprising a one-side step of extending the reinforcing wire in the drum width direction by delivering the reinforcing wire in a folded back state in a predetermined length that is set in advance from a central portion in a width direction of the forming drum toward a one-side in the width direction of the forming drum and compression bonding the reinforcing wire to the outer surface of the rubber member and an other-side step of extending the reinforcing wire in the drum width direction by delivering the reinforcing wire in a folded back state in a predetermined length that is set in advance from the central portion in the width direction of the forming drum toward an other-side in the width direction of the forming drum after delivering the reinforcing wire in the folded back state in the predetermined length that is set in advance toward the one-side in the width direction in the one-side step, and compression bonding the reinforcing wire to the outer surface of the rubber member, the reinforcing wire extended in the drum width direction being continuously disposed in the drum circumferential direction by repeatedly performing the one-side step and the other-side step at positions shifted in the drum circumferential direction, wherein the tire components (M1-M5) further comprise an innerlayer, characterized in that the one-side step and the other-side step are performed in a state where a leading edge portion of a range of the reinforcing wire is compression bonded and fixed in advance to the outer surface of the innerliner at the central portion in the width direction of the forming drum, and the other-side step starts before the one cycle of the one-side step is completed. forming a green tire by sequentially layering tire components (M1-M5) comprising a reinforcing wire on an outer surface of a forming drum while continuously disposing the reinforcing wire extended in a drum width direction on an outer surface of a rubber member disposed on the outer surface of the forming drum in a drum circumferential direction; and vulcanizing the green tire, the forming comprising a one-side step of extending the reinforcing wire in the drum width direction by delivering the reinforcing wire in a folded back state in a predetermined length that is set in advance from a central portion in a width direction of the forming drum toward a one-side in the width direction of the forming drum and compression bonding the reinforcing wire to the outer surface of the rubber member and an other-side step of extending the reinforcing wire in the drum width direction by delivering the reinforcing wire in a folded back state in a predetermined length that is set in advance from the central portion in the width direction of the forming drum toward an other-side in the width direction of the forming drum after delivering the reinforcing wire in the folded back state in the predetermined length that is set in advance toward the one-side in the width direction in the one-side step, and compression bonding the reinforcing wire to the outer surface of the rubber member, the reinforcing wire extended in the drum width direction being continuously disposed in the drum circumferential direction by repeatedly performing the one-side step and the other-side step at positions shifted in the drum circumferential direction, wherein the tire components (M1-M5) further comprise an innerlayer, characterized in that the one-side step and the other-side step are performed in a state where a leading edge portion of a range of the reinforcing wire is compression bonded and fixed in advance to the outer surface of the innerliner at the central portion in the width direction of the forming drum, and the other-side step starts before the one cycle of the one-side step is completed.