The purpose of this study is to examine the improvement and its effect of the lesson analysis ability in the teacher training program of social studies. In this papar, we analyze the interviews with the 3 students who have finished the teaching method class. As a result, it became clear that the factors which improve the lesson analysis ability are as follows: 1) the feedback of the students' outstanding analysis report, 2) the demonstration of the instructors' analysis model, and 3) the assignment of the comparative analysis on the similar lessons. Furthermore, the their improvement shows some effects: 1)the understanding of the purposes of the lesson analysis, 2) the ambition for the criterionreferenced lesson development, and 3) the construction of the Social Studies theory supporting the lesson development.