A tire (10) is employed for the rear wheel of a motorcycle. A tread surface (16) is provided with a waveform groove (22), an intermediate groove (23) and a shoulder groove (24). The waveform groove (22) meanders in a circumferential direction over the central portion of the tread surface (16). The intermediate groove (23) is provided on the left and right of the waveform groove (22) along the waveform groove (22). The intermediate groove (23) is present in a predetermined region (ER). The intermediate groove (23) is formed like a boomerang having a long portion (32) and a short portion (31). An angle θ with respect to the axial direction of the long portion (32) is 45 to 75 degrees. The shoulder groove (24) is provided on an outside in the axial direction of the tread surface (16). An angle α of the shoulder groove (24) is set to be 25 degrees≦α≦50 degrees and α