The right to clean air in public places (RCA) could be a good indicator of health consciousness. We surveyed the consciousness of RCA among residents (20 years of age or older; n = 1500) in city D, a satellite town of Osaka, and examined the relationship between life style and the knowledge aspect of RCA, one of the three aspects of the consciousness concerning RCA. Knowledge of laws concerning the smoking regulations in public places are divided into two categories. One is knowledge of laws concerning general matters, and the other is knowledge of laws concerning concrete matters. Therefore, we get two kinds of relationships. These are the relationship between life style and knowledge of laws concerning general matters, and the relationship between life style and knowledge of laws concerning concrete matters. We examined these two relationships by using Student's t test, and tried to determine the individual life style closely related to the scores for knowledge of laws with the chi-square test. We got following results. (1) The relationship between life style and knowledge of laws concerning general matters Knowledge scores got higher as the life style scores (HPI) became higher. This trend could be detected in all four subgroups. The scores of male subgroups were generally higher than those of female subgroups. This could be construed as follows: those who take care of their physical health have a lot of knowledge of laws concerning smoking regulations. (2) The relationship between life style and knowledge of laws concerning concrete matters Knowledge scores got lower as the life style scores became higher. This trend was almost the same in all four subgroups. The scores of male groups were generally higher than those of female subgroups. This trend could be construed as follows: men and women whose HPI is lower get more opportunities to be in the public places where smoking is totally allowed (e. g., bars) irrespective of their smoking status.