A run flat tire, having a tread portion, a pair of sidewall portions continuous with respective sides of the tread portion, bead portions continuous with the respective sidewall portions, and a side-reinforcing rubber having a crescent-shaped cross section and provided in each sidewall portion, wherein in a cross section in the tire width direction thereof: provided that an intersection of a straight line tangent to an outer contour line of a bead heel of a bead portion at an end (Ic) on the bead base surface side of the outer contour line and a straight line tangent to the outer contour line of the bead heel at an end on the bead back surface side of the outer contour line represents "bead heel point" (Ih) in a case where the outer contour line of the bead heel of the bead portion is constituted of a curved line, and provided that an intersection of an outer contour line, on the bead base surface side, of the bead heel and an outer contour line, on the bead back surface side, of the bead heel represents "bead heel point" (Ih) in a case where the outer contour line of the bead heel of the bead portion is constituted of straight lines (the bead heel point coincides with the sharp corner point of the bead heel in this case), diameter (Dh) of a circle collectively formed by the bead heel point is smaller by 1.7-2.9 mm than the rim diameter (Dr) of the prescribed rim; and provided that an intersection of an imaginary linear extension of a bead base surface from an end on the bead base surface side of an outer contour line of a bead toe of the bead portion and an imaginary linear extension of a bead inner surface from an end on the bead inner surface side of the outer contour line of the bead toe represents "bead toe point" (It) in a case where the outer contour line of the bead toe of the bead portion is constituted of a curved line, and provided that an intersection of an outer contour line, on the bead base surface side, of the bead toe and an outer contour line, on the bead inner surface side, of the bead toe represents "bead toe point" (It) in a case where the outer contour line of the bead toe of the bead portion is constituted of straight lines (the bead toe point coincides with the sharp corner point of the bead toe in this case), the bead heel of the bead portion is positioned on the outer side in the tire width direction and in the tire radial direction of the bead toe and a line linking the bead heel point (Ih) and the bead toe point (It) is inclined by an angle (α) of 12.2°-14.7° with respect to the tire width direction. provided that an intersection of a straight line tangent to an outer contour line of a bead heel of a bead portion at an end (Ic) on the bead base surface side of the outer contour line and a straight line tangent to the outer contour line of the bead heel at an end on the bead back surface side of the outer contour line represents "bead heel point" (Ih) in a case where the outer contour line of the bead heel of the bead portion is constituted of a curved line, and provided that an intersection of an outer contour line, on the bead base surface side, of the bead heel and an outer contour line, on the bead back surface side, of the bead heel represents "bead heel point" (Ih) in a case where the outer contour line of the bead heel of the bead portion is constituted of straight lines (the bead heel point coincides with the sharp corner point of the bead heel in this case), diameter (Dh) of a circle collectively formed by the bead heel point is smaller by 1.7-2.9 mm than the rim diameter (Dr) of the prescribed rim; and provided that an intersection of an imaginary linear extension of a bead base surface from an end on the bead base surface side of an outer contour line of a bead toe of the bead portion and an imaginary linear extension of a bead inner surface from an end on the bead inner surface side of the outer contour line of the bead toe represents "bead toe point" (It) in a case where the outer contour line of the bead toe of the bead portion is constituted of a curved line, and provided that an intersection of an outer contour line, on the bead base surface side, of the bead toe and an outer contour line, on the bead inner surface side, of the bead toe represents "bead toe point" (It) in a case where the outer contour line of the bead toe of the bead portion is constituted of straight lines (the bead toe point coincides with the sharp corner point of the bead toe in this case), the bead heel of the bead portion is positioned on the outer side in the tire width direction and in the tire radial direction of the bead toe and a line linking the bead heel point (Ih) and the bead toe point (It) is inclined by an angle (α) of 12.2°-14.7° with respect to the tire width direction.