Abstract: A pneumatic tire having an excellent tire uniformity without air leakage is manufactured by laying a central innerliner, belt layers and tread rubber on an outer circumference of a shaping drum with an outer surface form being approximately the same as an inner surface form of a tire product, and laying an approximately ring-shaped sidewall assembly comprising a bead core provided with a bead filler, a side carcass layer, an outside innerliner and the like on each side face of the shaping drum without a step of expanding and deforming a green case into an approximately semi-circular form.