Pneumatic Tire

The pneumatic tire includes a shoulder main groove and a center main groove disposed in one region demarcated by a tire equatorial plane and a shoulder land portion and a middle land portion defined by the shoulder main groove. The shoulder land portion is a rib that is continuous in a tire circumferential direction, and the middle land portion includes a plurality of middle lug grooves and a plurality of middle blocks defined by the plurality of middle lug grooves. When defining a section in the tire circumferential direction along an edge portion of one middle block close to the shoulder main groove, a groove width of the shoulder main groove continuously increases or decreases in the section.