Disclosed is a pneumatic tire for motorcycle wherein edge effect can be achieved without changing the design of block pattern, and stability of steering such as grip, feeling of grounding, or controllability of slip is enhanced. When a block having a recess in which a protrusion is formed on the bottom is provided in a tread, edge component increases correspondingly as compared with a block provided only with a recess (having no protrusion), and thereby traction can be enhanced. Since it is not required to increase the hardness of rubber of the read nor to enlarge the block size, feeling of grounding is ensured and controllability of slip can be ensured in a muddy place or on a soft road surface.