It is desired that researches on the fluid dynamics of swimming to rise the record of swimming match, but there are only a few investigations and these are not sufficient to solve fluid dynamic problems on swimming. The purpose of our research is to make clear the state of flow around the human body at swimming and to get the data to improve the swimming form. In addition, it is thought that there is the possibility of rising swimming record by the improvement of design and material of swimming suits.
　At first step, we carried out the resistance measurement and flow observation on a rigid model of human body, in the circulating water channel at naked condition and with various swimming suits of old and now type.
　As results, the water flow around the rigid model of human body at towing condition of constant form, and the effect of swimming suits on the resistance were made clear.

DESCENTE SPORTS SCIENCE Vol.5/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE