The purpose of this study is to propose the new point of view about the ideal style of PE lesson study for teachers' growth. It is based on the opinion survey of the primary school teachers who are studying PE on function of the PE lessons study. Furthermore, it was tried out to offer the structured model of the function of the PE lesson study considering the teachers' career and the type of the study groups they belong to. As a result, it was found out that there existed five functions: “the relationship with other teachers", “the evaluation from leaders", “the improvement of teaching technique", “the investigation of subject contents", and “self-reform". In addition, the teachers' career and the type of their study groups made differences in how much they demanded for those functions. Furthermore, it was suggested that the functions may transform as the teachers grow up. In particular, it is notable that the function transforms from “the improvement of teaching technique" to “the investigation of subject contents" when they move from mid-level stage to the experienced. This transformation shows that the subject of study changes from the investigation of methodology to the theory of aims and contents.It is claimed that the lesson study is losing substance and going into decline.However, there is possibility that the successful PE lesson study will be developed if we understand the study contents in common and form it in agreement, considering the characteristics of types of the lesson study and teacher's career who participate.