This study aims to clarify what opportunity made Elementary School Teacher A hold his view of teaching in physical education while he was engaged in an elementary school for 24 years. The results are summarized as following points. 1. Teacher A could get his teaching style of physical education at his first school of appointment, as his mentor advised professionally and mentally very well and good colleagues showed their teaching for his teaching model. 2. Teacher A developed professionally about teaching in physical education through in-service training in the physical education group for elementary school teachers of Y City. 3. Teacher A took the opportunity of facing a pupil's difficulty for learning physical education to begin exploring his view of teaching in physical education 4. Teacher A took the opportunity of lesson study about his teaching in physical education at the prefectural education center to begin establishing his view of teaching in physical education. 5. Teacher A developed professionally about teaching in physical education because he thought we had the expertise of teaching in physical education at elementary schools.