This paper reviews physiological and psychological results of human obtained through the saltwater pool experiment. Thalasso-theraphie is a traditional measure of health care and has a long history in European countries. Currently in Japan, Thalasso-Therapie is getting more popular as a new facility of the coastal area. However, data on physiological and psychological effects to human has been limited. In order to grasp these effects, experiment using saltwater pool was conducted under several conditions, and characteristics of flotation by use of SD method and physiological effects by heart rate fluctuation analysis were clarilied.