The purpose of this study were to investigate the status of contact lens wear in the pool among the female water polo players and to examine the safety of contact lens wear in the pool. Results were summarized as follows; 1) The percentage of players wearing eyeglasses or contact lens in daily life was 50.8%, and contact lens wear in the pool was 21.5% of all subjects. 2) The percentage of contact lens wear in the pool among the players of daily correct visual functions, were 63% in level A; 8 teams of high rank in Japan, and 27% in level B; 8 teams of low rank (p0.01). 3) The kinds of contact lenses wear in the pool were disposable (71.1%), hard type (18.4%) and soft contact lens (10.5%). 4) There were 66% of players wearing the same contact lens at the daily use and in the pool, and there was a tendency toward higher corneal and conjunctival damage. We concluded that contact lens wear in the pool is important matter to complete the high performance at the water polo players with poor visual functions, and should be examined from the point of protecting the eye.