This study aims to clarify the process of formation and transformation of ‘teaching style’ in physical education of Elementary School Teacher C as the second study of a life history on the professional development of Teacher C’s teaching. The results are summarized as following points. 1. Teacher C formed his teaching style into mastery leaning for the accomplishment of the exercise skill through utilizing formative assessment. 2. Teacher C transformed his teaching style into supporting pupils’ learning for the accomplishment of the exercise skill through continuous cultivation of their motor sensation.