A pneumatic tire comprising: a tread; and a belt, wherein the belt is disposed radially inward of the tread, the belt includes a plurality of belt plies layered in a radial direction, each of the belt plies includes multiple steel belt cords and a topping rubber, the belt cords are covered by the topping rubber, each of the belt cords includes a twisted string obtained by twisting together four filaments, the belt cord has an elliptical cross-section, on the elliptical cross-section, a minor axis of the cross-section extends in a thickness direction of the belt ply, a ratio of a length of the minor axis to a length of a major axis of the cross-section is greater than or equal to 0.67 and not greater than 0.94, the four filaments are a first filament, a second filament, a third filament, and a fourth filament arranged in clockwise order, respectively, the first filament and the third filament are disposed along the minor axis, and the first filament is in contact with the second filament or the fourth filament, the third filament is in contact with the second filament or the fourth filament, the first filament and the third filament are each in contact with the second filament and the fourth filament, or the first filament is in contact with the third filament, characterized in that a thickness (t) of the topping rubber 44 that corresponds to a length from an outer surface of the belt ply to an outer surface of the belt cord along the minor axis of the belt cord is greater than or equal to 0.20 mm and not greater than 0.30 mm and a thickness (ta) of each belt ply is greater than or equal to 1.30 mm and not greater than 1.55 mm, and an outer diameter of each filament is greater than or equal to 0.41 mm and not greater than 0.43 mm. a tread; and a belt, wherein the belt is disposed radially inward of the tread, the belt includes a plurality of belt plies layered in a radial direction, each of the belt plies includes multiple steel belt cords and a topping rubber, the belt cords are covered by the topping rubber, each of the belt cords includes a twisted string obtained by twisting together four filaments, the belt cord has an elliptical cross-section, on the elliptical cross-section, a minor axis of the cross-section extends in a thickness direction of the belt ply, a ratio of a length of the minor axis to a length of a major axis of the cross-section is greater than or equal to 0.67 and not greater than 0.94, the four filaments are a first filament, a second filament, a third filament, and a fourth filament arranged in clockwise order, respectively, the first filament and the third filament are disposed along the minor axis, and the first filament is in contact with the second filament or the fourth filament, the third filament is in contact with the second filament or the fourth filament, the first filament and the third filament are each in contact with the second filament and the fourth filament, or the first filament is in contact with the third filament, characterized in that a thickness (t) of the topping rubber 44 that corresponds to a length from an outer surface of the belt ply to an outer surface of the belt cord along the minor axis of the belt cord is greater than or equal to 0.20 mm and not greater than 0.30 mm and a thickness (ta) of each belt ply is greater than or equal to 1.30 mm and not greater than 1.55 mm, and an outer diameter of each filament is greater than or equal to 0.41 mm and not greater than 0.43 mm.