PNEUMATIC TIRE

Provided is a pneumatic tire that allows reduction of vibration of a tread portion to reduce noise without depending on a groove volume.A pneumatic tire 1 has a tread portion 2. The pneumatic tire 1 includes; tread rubber 2G disposed in the tread portion 2; and a vibration absorber 10 disposed at a tire inner cavity in the tread portion 2. A natural angular frequency ratio α of the vibration absorber 10 relative to the tread rubber 2G and a damping ratio ζa of the vibration absorber 10 satisfy the following expressions (1) and (2). 0.5≤α≤0.93.1≤4ζa+3α≤5.5