Pneumatic Tire

A modulus at 300% elongation of a cap tread ranges from 3.0 Mpa to 7.0 Mpa, a modulus at 300% elongation of a undertread ranges from 10.0 Mpa to 20.0 Mpa, and a modulus at 300% elongation of an earthing tread ranges from 10.0 Mpa to 20.0 Mpa. Additionally, an earthing tread is made from a rubber material with a volume resistivity of 1×10{circumflex over ( )}7Ω·cm or less. The undertread includes a thickened portion in a region between the earthing tread and an edge portion of a block. The gauge of the undertread gradually increases from the earthing tread toward the edge portion of the block due to the thickened portion.