Pneumatic Tire

A pneumatic tire (1) comprises a tread portion (2) provided in a tread face thereof with tread elements each provided with at least one zigzag sipe (21), a cap tread rubber (Rc) defining the tread face, and a base tread rubber (Rb) disposed radially inside the cap tread rubber, wherein the zigzag sipe comprises zigzag segments (22) which are alternating circumferentially-oriented segments and axially-oriented segments, and an amplitude center line (n) of the zigzag sipe is inclined at an angle (theta) of from 0 to 45 degrees with respect to the tire circumferential direction, and the zigzag sipe has a bottom (G) including alternating deep parts and shallow parts in comparison with the level of the boundary (S) between the cap tread rubber and base tread rubber.