The invention provides a pneumatic tire capable of suppressing uneven wear of the tread portion. The pneumatic tire (1) includes a tread portion (2). In the contact patchs (15) of the tread portion (2) subjected to a load of 40% to 70% of the standard load at a zero camber angle in a standard state of being assembled on a standard wheel rim and adjusted to standard internal pressure, the contact patch (15) subjected to respective loads, for each load, has a crown ground contact length Lc at the center of the tire axial direction; a shoulder ground length Ls at 80% of the maximum ground contactwidth in the contact patch (15) at the time of the load; and their ratio Lc/Ls. The ratio Lc/Ls upon being loaded with 40% of a standard load is equal to or less than 125% of the ratio Lc/Ls upon being loaded with 70% of the standard load.