A pneumatic tire which is provided with an inner liner in the inside thereof, wherein the inner liner is constituted of a sheet made from an elastomer composition which comprises 7 to 93 mass% of a styrene-isobutylene-styrene triblock copolymer and 7 to 93 mass% of an isobutylene-based modified copolymer that contains a beta-pinene component, while the Gs/Gb ratio of the inner liner is 0.30 to 0.75, Gb being an average thickness in the bead region (Rb) extending from the tire maximum width position to the bead toe, and Gs being an average thickness in the buttress region (Rs) extending from the tire maximum width position to the position (Lu) corresponding to the edge of a belt layer.
