A pneumatic radial tire comprising: a tread having an outer surface which forms a tread surface; a pair of sidewalls extending from ends of the tread, respectively, substantially inward in a radial direction; a pair of beads located substantially inward of the sidewalls, respectively, in the radial direction; a carcass extending on and between one of the beads and the other of the beads and along and inward of the tread and the sidewalls; a belt laminated on the carcass at an inner side, in the radial direction, of the tread; and a liner located inward of the carcass, wherein outer ends of the sidewalls are located inward of ends of the belt in an axial direction, the liner includes a first inner liner extending on and between one of the beads and the other of the beads and along and inward of the carcass; characterized in that the liner includes a pair of second inner liners extending from the ends of the belt, respectively, along the first inner liner substantially inward in the radial direction, the second inner liners are located between the first inner liner and the carcass, outer ends of the second inner liners are located inward of the ends of the belt in the axial direction, the first inner liner is formed by a first sheet, formed from a first rubber composition, being crosslinked, each second inner liner is formed by a second sheet, formed from a second rubber composition, being crosslinked, each second sheet has a reference end corresponding to the outer end of the second inner liner, in forming the liner, each second sheet is attached to the first sheet such that the reference end of the second sheet abuts against an outer surface of the first sheet, each second sheet has an inclined surface extending from the reference end so as to be inclined relative to the outer surface of the first sheet, an inclination angle of the inclined surface of each second sheet is equal to or greater than 10° but equal to or less than 45°, a base rubber of the first rubber composition includes a butyl rubber, and a base rubber of the second rubber composition includes a diene rubber. a tread having an outer surface which forms a tread surface; a pair of sidewalls extending from ends of the tread, respectively, substantially inward in a radial direction; a pair of beads located substantially inward of the sidewalls, respectively, in the radial direction; a carcass extending on and between one of the beads and the other of the beads and along and inward of the tread and the sidewalls; a belt laminated on the carcass at an inner side, in the radial direction, of the tread; and a liner located inward of the carcass, wherein outer ends of the sidewalls are located inward of ends of the belt in an axial direction, the liner includes a first inner liner extending on and between one of the beads and the other of the beads and along and inward of the carcass; characterized in that the liner includes a pair of second inner liners extending from the ends of the belt, respectively, along the first inner liner substantially inward in the radial direction, the second inner liners are located between the first inner liner and the carcass, outer ends of the second inner liners are located inward of the ends of the belt in the axial direction, the first inner liner is formed by a first sheet, formed from a first rubber composition, being crosslinked, each second inner liner is formed by a second sheet, formed from a second rubber composition, being crosslinked, each second sheet has a reference end corresponding to the outer end of the second inner liner, in forming the liner, each second sheet is attached to the first sheet such that the reference end of the second sheet abuts against an outer surface of the first sheet, each second sheet has an inclined surface extending from the reference end so as to be inclined relative to the outer surface of the first sheet, an inclination angle of the inclined surface of each second sheet is equal to or greater than 10° but equal to or less than 45°, a base rubber of the first rubber composition includes a butyl rubber, and a base rubber of the second rubber composition includes a diene rubber.