Facial expressions plays very important role in the human mood analysis. Various facial expressions viz happy, disgust, anger, sad, surprise and normal are recognized using Eigen based facial appearance of person. In this paper facial expressions are recognized using only mouth feature because mouth plays very dominant role in the recognition process. Computational cost and the dimension of the feature set is reduced by applying PCA method only on the mouth feature not on entire face. The experimental results demonstrate the efficiency of the proposed approach. Keywords:- Facial expression, Eigen Face, PCA, mouth feature I