1. A method of simulating deformation of a viscoelastic material in which filler is blended to a matrix made of resin or rubber, the method comprising the steps of: dividing the viscoelastic material to a finite number of elements to form a viscoelastic material model; performing deformation calculation of the viscoelastic material model based on a predetermined condition; and acquiring necessary physical amount from the deformation calculation, wherein the step of dividing the viscoelastic material into a finite number of elements includes steps of: dividing the matrix into a finite number of elements to form a matrix model; and dividing at least one filler into a finite number of elements to form a filler model.