To provide a tire manufacturing method which holds a predetermined gap between belt layers even if there is mutual lateral core shift between belt layers in a manufacturing process and there is irregularity at the preset position of an internal rubber material to a belt layer material and markedly making the width of the internal rubber material narrower than before not only to drastically save the internal rubber material but also to hold the original performance of the belt.

The internal rubber materials are preset to both end parts in the lateral direction of the narrower belt layer material among two belt layer materials before two belt layer materials are laminated.