A pneumatic tire (2; 22; 102), comprising: a tread (24; 106) having a tread surface (44; 126) on its outer surface; a pair of sidewalls (26; 110) each extending from an edge of the tread (24; 106) in an approximately radially inward direction; a pair of clinches (6; 28; 112) each extending from an edge of the sidewall in an approximately radially inward direction; a pair of beads (4; 30; 114) each positioned on the axially inner side of the clinch (6; 28; 112); and a carcass (32; 116) extending along the inner side of the tread (24; 106) and sidewalls (26; 110) to bridge one bead and the other bead, wherein the bead portions each include a fitting portion (10; 66; 144) that extends in a circumferential direction to be fitted to a rim (12; 76), the fitting portion (10; 66; 144) comprises a bottom surface (72; 148) positioned on the radially inner side and a side surface (74; 150) positioned on the axially outer side, the bottom surface (72; 148) includes a heel (92; 152) on its axially outer side, the side surface (74; 150) includes a concave (98; 154) extending in a circumferential direction, in a cross section perpendicular with respect to a circumferential direction of the tire (2; 22; 102), when the axially outer edge of the bottom surface (72; 148) is set as a first base point, when a virtual straight line that passes through the first base point and extends in an axial direction is set as a first base line, and when a virtual straight line that passes through the first base point and extends in a radial direction is set as a second base line, the heel (92; 152) is shaped as a first arc having its center on the first base line and originating at the first base point, the heel (92; 152) makes contact with the side surface (74; 150) at the first base point, the concave (98; 154) is recessed from the second base line in an axially inward direction, characterized in that the axial distance (d) from the first base point to the bottom of the concave (98; 154) is at least 1.0 mm but no greater than 2.0 mm, when no load is applied to the tire. a tread (24; 106) having a tread surface (44; 126) on its outer surface; a pair of sidewalls (26; 110) each extending from an edge of the tread (24; 106) in an approximately radially inward direction; a pair of clinches (6; 28; 112) each extending from an edge of the sidewall in an approximately radially inward direction; a pair of beads (4; 30; 114) each positioned on the axially inner side of the clinch (6; 28; 112); and a carcass (32; 116) extending along the inner side of the tread (24; 106) and sidewalls (26; 110) to bridge one bead and the other bead, wherein the bead portions each include a fitting portion (10; 66; 144) that extends in a circumferential direction to be fitted to a rim (12; 76), the fitting portion (10; 66; 144) comprises a bottom surface (72; 148) positioned on the radially inner side and a side surface (74; 150) positioned on the axially outer side, the bottom surface (72; 148) includes a heel (92; 152) on its axially outer side, the side surface (74; 150) includes a concave (98; 154) extending in a circumferential direction, in a cross section perpendicular with respect to a circumferential direction of the tire (2; 22; 102), when the axially outer edge of the bottom surface (72; 148) is set as a first base point, when a virtual straight line that passes through the first base point and extends in an axial direction is set as a first base line, and when a virtual straight line that passes through the first base point and extends in a radial direction is set as a second base line, the heel (92; 152) is shaped as a first arc having its center on the first base line and originating at the first base point, the heel (92; 152) makes contact with the side surface (74; 150) at the first base point, the concave (98; 154) is recessed from the second base line in an axially inward direction, characterized in that the axial distance (d) from the first base point to the bottom of the concave (98; 154) is at least 1.0 mm but no greater than 2.0 mm, when no load is applied to the tire.