Our society can be defined as aging society. Nowadays the old started to be interested in the quality of life as “successful aging”. However it seemed to be there's rare research of sexual life of the old. Nowadays there's trend of interest of the old's sex. Therefore I researched on this subject. This study is on mutual relation research between trait of sexual life and an attitude toward sex and satisfaction of life. Data of 183 which is distributed from 3rd May 2004 to 15th May 2004 was used on analysis. As assessment tool, general trait of the old, the realities of the old's sexual life, degree of recognition of aging and degree of satisfaction of life is used.SPSSPC 11.0 program was used. The result as follows; 1. The answer to the question: “Is sexual life is important to your life?” was “yes it's important” was 31.7%, 61.6% of male old has sex. But 16.7% of female old was sexless. Frequency ofsex was male was over onetime in a month, female was only 12.1%. Even some female was sexless. Also, sexual partner of male was 29.5 percent of heterosexual friend, prostitute. Some male answered abuse himself. Barrier of sexual life was ‘anxiety about health’, ‘not decent’. There answer shows conservative morality and suppression of the old. 2. 36.6% of respondents agreed onheterosexual association. On difficulties of heterosexual association, female answered because of “too old”, male answered “too old, economic problem, custom”. This is due to custom which has younger female partner and economic burden only for man. 3. Recognition of aging was influenced by frequency of sex. That is to say, the more frequent sex, the lower recognition of aging. This shows that frequency of sex had key role in recognition of aging. With frequent sex, the old can spend health, young, confident life. 4. For the old, when he was satisfied with sexual life, his degree of satisfaction in life showed higher. Surely, condition of health and frequency of sex influenced degree of satisfaction in life. However, satisfaction of life more strongly influenced degree of satisfaction in life. That means sexual life has important meaning of life. Therefore, the oldthough who are old, fragile should have right to enjoy himself as sexual being. The change conservative custom of society which regard the old as non-sexual being, the program of problem of senior sex should be made and run. And special counseling should be expanded. Especially senior institution have to consider spouse of the old.