Provided is a tread for a pneumatic tire, the tread being configured so that an air column resonance can be reduced and so that satisfactory water discharge performance can be maintained until the end stage of wear of the tread section. This tread for a pneumatic tire has flexible fences (4) which are disposed in at least one main groove (3), extend from the bottom surface (33) of the main groove (3), and block at least 70% of the cross-sectional area of the main groove (3). The flexible fences (4) each have: an inner portion having a connection section (411) connecting to the main groove (3); and an outer portion located on the outside radially of a point at a height (D1) from the bottom surface (33) of the main groove (3). The average tilt angle of the inner portion relative to a line perpendicular to the surface of the tread section which comes into contact with the road surface is greater than the average tilt angle of the outer portion.