In this paper, a computer technique to analyze the contact stress distributions between two elastic bodies is proposed. The technique is the inverse analysis method using the information, which is forces or stresses measured by experimental techniques, on the surface of elastic body distant from the contact area. The finite element method is used to formulate the method. Under the assumed contact area the stresses of one of the elastic bodies in contact, of which the experimental information is used in calculation, are analyzed. Furthermore, by minimizing the square sum of stresses at the contact area the reasonable contact area and the stress distribution are obtained. The validity of this technique is proved numerically by the analysis of two-dimensional contact problem.