A pneumatic tire comprises: a tread portion with an inboard and an outboard tread edges; a pair of inboard and outboard center main grooves to define a center portion therebetween; a pair of inboard and outboard shoulder main grooves; an inboard middle portion between the inboard center and shoulder main grooves; an outboard middle portion between the outboard center and shoulder main grooves; an inboard shoulder portion defined the axially outside of the inboard shoulder main groove; an outboard shoulder portion defined the axially outside of the outboard shoulder main groove; the outboard shoulder main groove with a groove width smaller than those of other main grooves; the outboard middle portion having a width larger than that of the inboard middle portion; and a plurality of outboard shoulder lateral grooves each extending from the outboard tread edge to its inner end terminating on the outboard middle portion.