Abstract: A pneumatic tire (10) is provided with turbulence generating projections (100) extending in a tire radial direction and arranged in the tire side portion (30) located between the tread (20) and beads. If the length of each turbulence generating projection (100) in the radial direction of the tire is L, the Young's modulus of the material which forms the turbulence generating projection (100) is E, and the second moment of area of a cross section of the turbulence generating projection (100) taken perpendicularly to the extending direction of the projection is I, the turbulence generating projections (100) satisfy the relationship of L2?3.5×E×I. The configuration assures the effect of heat dissipation of the tire side portion and minimizes deformation of the turbulence generating projections caused by oil flying from the outside.