A pneumatic tire (1,2,3,4) comprising a carcass having a carcass body composed of a ply formed of a plurality of carcass cords, covered with rubber material, toroidally extending between a pair of bead cores, and a carcass folded-back portion where the carcass body wound around the bead core from inside toward outside of the tire and extended outside in a tire radial direction, wherein a gradual decrease region is provided, in which a distance between the carcass body and the carcass folded-back portion along a line normal to the carcass body gradually decreases toward outside in the tire radial direction, a first filling material (31, 131, 133, 135) and a second filling material (32, 132, 134, 136) sequentially arranged from the bead core toward outside in the tire radial direction, are provided between the carcass body and the carcass folded-back portion located outside in a tire width direction than the carcass body located, an end of the first filling material (31A, 131A, 133A, 135A) outside in the tire radial direction is located in the gradual decrease region, a part of the first filling material (31, 131, 133, 135) and the second filling material (32, 132, 134, 136) contacts with the rubber material forming the carcass body, the end of the first filling material (31A, 131A, 133A, 135A) outside in the tire radial direction and an end of the second filling material (32A, 132A) inside in the tire radial direction are overlapped in the tire width direction W, a thickness in the tire width direction W of the first filling material (31, 131, 133, 135) at the end outside in the tire radial direction decreases toward outside in the tire radial direction a height CE from a rim base line BL, which is an axis line of the tire passing through a position in the rim defining a rim diameter, to an end of the carcass folded-back portion, and a height OWH from the rim base line BL to a carcass maximum width portion of the carcass body having a maximum width in the tire width direction, satisfy a relation of 0.85OWH≦CE≦1.2OWH; characterised in that: an end of the second filling material (32A, 132A) inside in the tire radial direction is located more inside in the tire radial direction than a contact position in contact with a rim flange of a rim defined by standards for mounting the pneumatic tire in the bead portion of the pneumatic tire (1,2,3,4), and a height KSH from the rim base line BL to the end of the first filling material (31A, 131A, 133A, 135A) outside in the tire radial direction, the height OWH, and a height FH from the rim base line BL to the end of the rim flange (101, 101A) outside in the tire radial direction, satisfy a relation of 0.2≦[(KSH-FH)/(OWH-FH)]≦0.28. an end of the second filling material (32A, 132A) inside in the tire radial direction is located more inside in the tire radial direction than a contact position in contact with a rim flange of a rim defined by standards for mounting the pneumatic tire in the bead portion of the pneumatic tire (1,2,3,4), and a height KSH from the rim base line BL to the end of the first filling material (31A, 131A, 133A, 135A) outside in the tire radial direction, the height OWH, and a height FH from the rim base line BL to the end of the rim flange (101, 101A) outside in the tire radial direction, satisfy a relation of 0.2≦[(KSH-FH)/(OWH-FH)]≦0.28.