PNEUMATIC TIRE

To provide a pneumatic tire excellent in steering stability and fuel efficiency at high-speed driving, .it is provided a pneumatic tire having a tread portion with a circumferential groove and a belt layer, wherein a monofilament cord is used as a reinforcing cord for the belt layer; the number of arrangements e (lines/5 cm) of the monofilament cords arranged per 5 cm in the tire width direction in the tire radial cross section of the belt layer is 50/5 cm or more; and the distance G (mm) from the surface of the land portion closest to the equatorial plane among land portions separated by the circumferential groove to the monofilament cord, and the loss tangent (30°Ctan δ) when the rubber composition constituting the surface of the tread portion is measured under conditions of temperature: 30°C, initial strain: 5%, dynamic strain: ±1%, frequency: 10Hz, and deformation mode: tensile, satisfy 30°Ctan δ × G < 1.5.