All structures have the potential to contain inclusion. Tensile load was given to inclusion. High stress appeared on the matrix in the circumference of the inclusion, which exfoliates from the matrix due to the high stress. Cracks them appeared on the matrix, gradually spread and destroyed the structure. This study researched elliptic inclusion in the tensile load. The direction of the tensile load is defined in the zero. Elliptic inclusion has some angle value. Studies on inclination elliptic inclusion did not exist until today. This study used the photoelastic method, method of caustics and finite element method. There are a few studies on inclusion by the experimental analysis but experimental analysis is difficult. However, this study identified a method for the experimental analysis of inclusion. If this method is used, results can easily be obtained by the experimental analysis of inclusion. As a result of this study, an elliptic inclusion equation was obtained. Elliptic inclusion can approximate all inclusions, and the result of this study can be applied to all inclusions.