In order to apply high-strength materials to RC members, it is necessary to clarify and reflect in the design their basic properties such as flexural strength and ductility. For this purpose, cyclic loading tests were carried out on RC column members made of high-strength materials. This paper describes the applicability of ordinary design codes to RC members made of high-strength materials, based on the load-displacement relationship obtained by cyclic loading tests. As a result of examination and analysis, it has become clear that the load-displacement relationship of members made of high-strength materials can be evaluated using ordinary design codes by appropriate consideration of material strength characteristics.