A pneumatic tire (2, 42) comprising a tread (4, 44), a pair of sidewalls (6, 46), a pair of beads (10, 50), and a carcass (12, 52), wherein: each bead (10, 50) includes a core (30, 62) and a first apex (32, 64) extending from the core (30, 62) outward in a radial direction; characterized in that in a state where the tire (2, 42) is mounted on a normal rim and inflated with air to a normal internal pressure and no load is applied to the tire (2, 42), when a position, on a profile of an outer surface of the tire (2, 42), at which a width of the tire (2, 42) is at its maximum is referred to as reference position Pm 0, a straight line that passes through the reference position Pm 0 and extends in an axial direction is referred to as reference line M 0, a height from the reference position Pm 0 to an outer end of the tread (4, 44) in the radial direction is denoted by Ht 0, and a reference line that is located outward of the reference line M 0 in the radial direction and extends in the axial direction and from which a distance to the reference line M 0 is 0.2 times of the height Ht 0 is denoted by L 0, a radius of curvature Rp 0 of a circular arc Cp 0 that has a center Zp 0 on the reference line M 0 and passes through a point of intersection Pp 0 between the reference line M 0 and an outer surface of the carcass (12, 52) and a point of intersection Pq 0 between the reference line L 0 and the outer surface of the carcass (12, 52) is smaller than a distance Lp 0 between the center Zp 0 and an end (41, 70) of the first apex (32, 64); and in a state where the tire (2, 42) is mounted on the normal rim and inflated with air to the normal internal pressure and a load equal to 120% of the normal load is applied to the tire (2, 42), when a position, on the profile of the outer surface of the tire (2, 42), at which the width of the tire (2, 42) is at its maximum is referred to as reference position Pm 120, a straight line that passes through the reference position Pm 120 and extends in the axial direction is referred to as reference line M 120, a height from the reference position Pm 120 to the outer end of the tread (4, 44) in the radial direction is denoted by Ht 120, and a reference line that is located outward of the reference line M 120 in the radial direction and extends in the axial direction and from which a distance to the reference line M 120 is 0.2 times of the height Ht 120 is denoted by L 120, a radius of curvature Rp 120 of a circular arc Cp 120 that has a center Zp 120 on the reference line M 120 and passes through a point of intersection Pp 120 between the reference line M 120 and the outer surface of the carcass (12, 52) and a point of intersection Pq 120 between the reference line L 120 and the outer surface of the carcass (12, 52) is smaller than a distance Lp 120 between the center Zp 120 and the end (41, 70) of the first apex (32, 64). each bead (10, 50) includes a core (30, 62) and a first apex (32, 64) extending from the core (30, 62) outward in a radial direction; characterized in that in a state where the tire (2, 42) is mounted on a normal rim and inflated with air to a normal internal pressure and no load is applied to the tire (2, 42), when a position, on a profile of an outer surface of the tire (2, 42), at which a width of the tire (2, 42) is at its maximum is referred to as reference position Pm 0, a straight line that passes through the reference position Pm 0 and extends in an axial direction is referred to as reference line M 0, a height from the reference position Pm 0 to an outer end of the tread (4, 44) in the radial direction is denoted by Ht 0, and a reference line that is located outward of the reference line M 0 in the radial direction and extends in the axial direction and from which a distance to the reference line M 0 is 0.2 times of the height Ht 0 is denoted by L 0, a radius of curvature Rp 0 of a circular arc Cp 0 that has a center Zp 0 on the reference line M 0 and passes through a point of intersection Pp 0 between the reference line M 0 and an outer surface of the carcass (12, 52) and a point of intersection Pq 0 between the reference line L 0 and the outer surface of the carcass (12, 52) is smaller than a distance Lp 0 between the center Zp 0 and an end (41, 70) of the first apex (32, 64); and in a state where the tire (2, 42) is mounted on the normal rim and inflated with air to the normal internal pressure and a load equal to 120% of the normal load is applied to the tire (2, 42), when a position, on the profile of the outer surface of the tire (2, 42), at which the width of the tire (2, 42) is at its maximum is referred to as reference position Pm 120, a straight line that passes through the reference position Pm 120 and extends in the axial direction is referred to as reference line M 120, a height from the reference position Pm 120 to the outer end of the tread (4, 44) in the radial direction is denoted by Ht 120, and a reference line that is located outward of the reference line M 120 in the radial direction and extends in the axial direction and from which a distance to the reference line M 120 is 0.2 times of the height Ht 120 is denoted by L 120, a radius of curvature Rp 120 of a circular arc Cp 120 that has a center Zp 120 on the reference line M 120 and passes through a point of intersection Pp 120 between the reference line M 120 and the outer surface of the carcass (12, 52) and a point of intersection Pq 120 between the reference line L 120 and the outer surface of the carcass (12, 52) is smaller than a distance Lp 120 between the center Zp 120 and the end (41, 70) of the first apex (32, 64).