The purpose of this survey was to investigate the nutritional status of special working persons related to health status, nutrient intake and living environment. The survey was conducted on workers in 9 general hospitals and 2 factories from Nov. 24 in 1979 to Jan. 20 in 1980. Nurses, medical doctors on intership or residency, and factory workers were chosen as subjects because of their irregular working hours, i.e., they sometimes work during the day and. sometimes at night. The total number of subjects was 417 for nurses, for medical doctors was 91, and was 216 for factory workers, all together 724 subjects were investigated. The results obtained are summarized as follows: 1) Average nutrient intake of subjects per day. For nurses the caloric intake was 1743 Kcal. This was composed of carbohydrate 251g(57.6%), protein 81g (18.5%), and fat 46g (23.9%). Other nutrient intake, such as iron (16mg), thiamin (0.98mg), riboflavin (1mg) was lower than the recommended dietary allowance. For male medical doctors, the caloric intake was 2064 Kcal, This was composed of carbohydrate 288g (55.8%), protein 102g (19.8%) and fat 56g (24.4%). Other nutrient consumption, such as riboflavin (1.31mg) was lower than the recommended dietary allowance. For female medical doctors, the caloric intake was 1909 Kcal. This was composed of carbohydrate 156g(53.7%), protein 90g (18.9%) and fat 58g (27.4%). For male factory workers, caloric intake was 1699 Kcal. This was composed of carbohydrate 317g(74.5%), protein 64g (15.0%) and fat 20g(10.5%). Other nutrient intake, such as vitamin A (4765IU), ascorbic acid (46mg) and riboflavin (1.11mg) were lower than the recommended dietary allowance. For female factory workers, the caloric intake was 1630 Kcal. This was composed of carbohydrate 287g (70.5%), protein 65g (15.8%) and fat 25g (13.7%). Other nutrient consumption, such as iron (15mg), riboflavin (1.04mg), ascorbic acid (42mg), and vitamin A (4334IU) was lower than the recommended dietary allowance. The percentage of animal protein to total protein was 65.2% in nurses, 67.4% in male medical doctors, 64.9% in female medical doctors, 38.6% in male factory workers, and 45.6% in female factory workers. 2) The average Kaup's value of subjects was 1.9 in nurses, 2.2 in male mcdical doctors, 1.9 in female medical doctors, 2.0 in male factory workers, and 2.1 in female factory workers. 3) The health status of subjects according to their self diagnosed answer was as follows; The percentage of food health was 82. 7% in nurse, 82.7% in nurse, 83.5% in medical doctor, and 56% in factory workers. The remainder answered that they were in poor health.