To prevent the peeling of the bonding surface of the inner liner layer of a green tire and the adhesion of an inner liner to a bladder.

A green tire 5 composed of unvulcanized rubber wherein both end parts in the peripheral direction of the inner liner layer 1 provided to the inner surface of a green tire 5 are mutually bonded is molded and, after a release agent is applied to the inner surface of the green tire 5, a vulcanizing bladder 1 is inserted into the green tire 5 to be expanded to vulcanize and mold the green tire in a mold. In this case, a rubber compsn. soln. with viscosity of 10,000-200,000cPs obtained by dissolving a rubber component with a number average mol.wt. of 180,000-500,000 in org. solvent along with other compounding agent is applied to the bonding part 8 of the inner liner layer 1 before the release agent is applied to the inner surface of the green tire 5 to form a rubber compsn. layer 9.