In a pneumatic tire with a carcass layer mounted between a pair of bead portions, a transponder is embedded in an outer side of the carcass layer in the tire width direction, a rubber member having the largest storage modulus at 20 C. of rubber members located on an outer side of the transponder in the tire width direction has a modulus M50out(0 C.) during 50% deformation at 0 C. and a modulus M50out(20 C.) during 50% deformation at 20 C. that satisfy a relationship 0.50M50out(0 C.)/M50out(20 C.)<1.00, and a rubber member having the largest storage modulus at 20 C. of rubber members located on an inner side of the transponder in the tire width direction has a modulus M50in(0 C.) during 50% deformation at 0 C. and a modulus M50in(20 C.) during 50% deformation at 20 C. that satisfy a relationship 0.25M50in(0 C.)/M50in(20 C.)<1.00.

In an apex 34 of a tire 2, a reinforcing portion 48 is located inward of a main body 46 in an axial direction. When a position on an outer surface of the tire 2 at which position a height from a BBL is 14 mm is defined as a first point P1 and a position on the outer surface of the tire 2 at which position a height from the BBL is 20 mm is defined as a second point P2, the reinforcing portion 48 overlaps the first point P1 and the second point P2 in a radial direction. A loss tangent of the reinforcing portion 48 is equal to a loss tangent of the main body 46 or less than the loss tangent. A hardness of the reinforcing portion 48 is equal to a hardness of the main body 46 or greater than the hardness.