1. A structure analysis processing method of making the structure analysis of a modeled analysis object to which a pressure is applied, using a VOXEL method, the method comprising: calculating a pressure V p to be applied to a VOXEL model for the analysis object in accordance with an expression V p &equals;F p ×C s /V s where the pressure applied on the analysis object is F p, an actual area of the analysis object to apply the pressure is C s, and the area in the VOXEL model corresponding to the actual area for applying the pressure is V s ; and making the structure analysis using the VOXEL method with the calculated pressure V p as the pressure applied to the VOXEL model.