This study aims to clarify the relation to the appropriateness of motor skills and that of self-assessment. The results are summarized as following points. (1) When teaching it seven all times, the improvement of motor skills was seen. Especially, it seems that an individual instruction was effective. (2) The appropriateness of the self-assessment of the pupils has improved by objectively observing their own performance through the video image, and receiving assistance and advice by the teacher. Pupils with high skills were able to do their self-assessment more appropriately. (3) The process of learning of two extracted children was verifi ed as the case. It was able to be interpreted that child A improved her performance by the teacher's direct guidance, and she had come to be able to do an appropriate self-assessment. Child B was able to improve her appropriateness of the self-assessment by having objectively observed her own performance by the video image.