To provide a simulation method capable of performing the vibration analysis including the physical phenomenon of a gas filled in a cavity part of a pneumatic tire.

The method for pneumatic tire simulation comprises a step of setting a pneumatic tire model 1, a step of setting a road surface model, and a step of bringing the pneumatic tire model 1 into contact with the road surface model, turning the pneumatic tire model at the predetermined speed, and computing the deformation. The pneumatic tire model 1 includes a toroidal tire model 2 consisting of finite elements and having cavities continuous in the tire circumferential direction, and a cavity model consisting of finite elements and filled in a cavity part i of the tire model 2. In addition, a condition of constraint in which the relative distance between both models is not changed is defined in a boundary part between the cavity model 3 and the cavity part i of the tire model 2. The calculation of deformation includes that of the cavity model 3.

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