This study aimed to measure social identities to belonging university using the Photo Projective Method (PPM) and the social identity scale. PPM is a new technique based on a projective method that uses photographs to capture perceived environments. First, we developed the social identity scale by referring to previous researches on social identity scales and a sense of community scales. Second, 96 university students were provided with a camera and requested to photograph their daily lives in their universities for a week. The Correspondence Analysis showed that the pictures represented some new aspects of the social identities that could not be measured by ordinal social identity scales based on verbal responses. Further, the significant correlations between social identity measured by PPM and social identity measured by verbal responses suggested the validity of PPM. We discussed the possibilities and disadvantages of the PPM as a tool of social research.