A pneumatic tire for a motorcycle, comprising: a tread; a pair of beads (10, 10); a carcass; and a reinforcement layer, wherein the tread includes the tread surface which makes contact with the ground, each bead is positioned on the radially inner side of the tread, the carcass is bridged between one bead and the other bead, the reinforcement layer is laminated on the carcass on the radially inner side of the tread, each bead is provided with a core and an apex, and the apex extends from the core in a radially outward direction, and the outer edge of the apex is positioned on the radially outer side of the edge of the tread surface, wherein the carcass comprises a first ply and a second ply, the first ply is turned up around the core from the axially inner side toward the outer side, the turn-up structure divides the first ply into the main portion which extends from the equatorial plane toward the core and the turn-up portion which extends from the core in a radially outward direction, and the turn-up portion overlaps the reinforcement layer, an edge of the turn-up portion of first ply is sandwiched between reinforcement layer and a main portion of second ply, and the carcass further comprises a second ply, the second ply is turned up around the core from the axially inner side toward the outer side, the turn-up structure divides the second ply into the main portion that extends from the equatorial plane toward the core and the turn-up portion that extends from the core in a radially outward direction, characterized in that the radial length (Lpf) from the radially outer edge Pf of the flange of a rim for mounting the tire to the edge of the turn-up portion of the second ply is set at 5 mm or less. a tread; a pair of beads (10, 10); a carcass; and a reinforcement layer, wherein the tread includes the tread surface which makes contact with the ground, each bead is positioned on the radially inner side of the tread, the carcass is bridged between one bead and the other bead, the reinforcement layer is laminated on the carcass on the radially inner side of the tread, each bead is provided with a core and an apex, and the apex extends from the core in a radially outward direction, and the outer edge of the apex is positioned on the radially outer side of the edge of the tread surface, wherein the carcass comprises a first ply and a second ply, the first ply is turned up around the core from the axially inner side toward the outer side, the turn-up structure divides the first ply into the main portion which extends from the equatorial plane toward the core and the turn-up portion which extends from the core in a radially outward direction, and the turn-up portion overlaps the reinforcement layer, an edge of the turn-up portion of first ply is sandwiched between reinforcement layer and a main portion of second ply, and the carcass further comprises a second ply, the second ply is turned up around the core from the axially inner side toward the outer side, the turn-up structure divides the second ply into the main portion that extends from the equatorial plane toward the core and the turn-up portion that extends from the core in a radially outward direction, characterized in that the radial length (Lpf) from the radially outer edge Pf of the flange of a rim for mounting the tire to the edge of the turn-up portion of the second ply is set at 5 mm or less.