This paper deals with the stress concentration problems of an infinite elastic plate with a rigid circular inclusion under in-plane shear loading. It is assumed that there are partially debonded boundary at the interface. In a previous paper, a method of solution was presented for the problem by using a fundamental solution for two point body forces. In this paper, we use a fundamental solution for four point body forces. Stress distributions at the interface are shown and the stress singularities at the tip of debonded interface are discussed.