TIRE FOR MOTORCYCLE FOR RUNNING ON ROUGH TERRAIN

A tread portion 2 of a tire 1 includes a plurality of shoulder blocks 11 and a plurality of middle blocks 12. An inner edge 11B in the tire axial direction of a tread surface of each shoulder block 11 protrudes on an outer side in a tire radial direction with respect to a virtual profile 18. A side surface S on the inner side in the tire axial direction of each shoulder block 11 includes one first side surface S1 extending from the inner edge 11B toward a groove bottom, and at least one second side surface S2 extending from a bottom side end of the first side surface S1 toward the groove bottom, and the second side surface S2 is a surface inclined toward the inner side in the tire axial direction relative to the first side surface S1.