The purpose of this study was to investigate the teacher efficacy and images of teacher and child on university students who participated in the Activity of Friendship at Hiroshima University. The survey was taken at the start and the end of an Activity of Friendship. And 86 students were participated in this survey. Results were that negative teacher and child images were significantly increased on the students in the first year and teacher efficacy was significantly increased on the students in the second year. These results indicated that through the Activity of Friendship experience, they get the real nature of the teacher and child on the first year, and have confidence of their skills about teaching on the second year. And these findings were suggested that the experience of the Activity of Friendship from the first year of university is effective in teaching practice they take place in the third year.