A method of manufacturing a pneumatic tire having a sidewall-over-tread structure with the sidewall formed to cover ends of tread having a base pen structure, comprising: a first cover forming step of wrapping sidewalls (34a, 34b) on opposite end portions of a first forming drum, pasting an inner liner and a ply on the center of the first forming drum, setting a pair of beads (36a, 36b) inside said sidewalls (34a, 34b), and forming sides (13a, 13b) of tread by strip-winding using a rubber strip having solid specific resistance of at most 1×10 7 Ωcm on said sidewalls (34a, 34b) outer than said beads (36a, 36b), and thereby forming a first cover; a tread ring forming step of successively pasting, on a second forming drum, a breaker and a band and then forming a center of tread by strip-winding on said band using a rubber strip having solid specific resistance of at least 1×10 8 Ωcm, and thereby forming a cylindrical tread ring; a shaping step of inserting said first cover inside said tread ring, and inflating that portion of said first cover which is between the said beads (36a, 36b), and thereby pressure-bonding said tread ring with said first cover to form a shape of a low cover, and a turn-up step of turning said sidewalls (34a, 34b) outside of said beads (36a, 36b) toward side surfaces of said inflated first cover and pasting said sidewalls (34a, 34b) on the side surfaces of said first cover, and bonding said sides (13a, 13b) of tread on the first cover and said center of tread on said tread ring to form, at least on one shoulder portion, a base pen structure having a conductive layer to be in contact with the ground by the width of at least 1 mm under the standard load defined by the Japan Automobile Tyre Manufacturing Association. a first cover forming step of wrapping sidewalls (34a, 34b) on opposite end portions of a first forming drum, pasting an inner liner and a ply on the center of the first forming drum, setting a pair of beads (36a, 36b) inside said sidewalls (34a, 34b), and forming sides (13a, 13b) of tread by strip-winding using a rubber strip having solid specific resistance of at most 1×10 7 Ωcm on said sidewalls (34a, 34b) outer than said beads (36a, 36b), and thereby forming a first cover; a tread ring forming step of successively pasting, on a second forming drum, a breaker and a band and then forming a center of tread by strip-winding on said band using a rubber strip having solid specific resistance of at least 1×10 8 Ωcm, and thereby forming a cylindrical tread ring; a shaping step of inserting said first cover inside said tread ring, and inflating that portion of said first cover which is between the said beads (36a, 36b), and thereby pressure-bonding said tread ring with said first cover to form a shape of a low cover, and a turn-up step of turning said sidewalls (34a, 34b) outside of said beads (36a, 36b) toward side surfaces of said inflated first cover and pasting said sidewalls (34a, 34b) on the side surfaces of said first cover, and bonding said sides (13a, 13b) of tread on the first cover and said center of tread on said tread ring to form, at least on one shoulder portion, a base pen structure having a conductive layer to be in contact with the ground by the width of at least 1 mm under the standard load defined by the Japan Automobile Tyre Manufacturing Association.