The present invention is to manufacture diet food lowering the entire calories and increasing the nutrients and immunity based on the nutritional grounds and expected analysis. Recently, reckless meals and intake of high calorie food of contemporary people are direct or indirect causes of lifestyle related diseases such as diabetes, obesity, constipation, atherosclerosis, hypertension, etc. The present invention provides functional instant cooked rice helping in diet and the diabetes, and comprises 85-95 weight% of mixed cereals of naked barley, unpolished rice, kelp unpolished rice, tetrastichum, black rice, black glutinous rice, pressed barley, split barely, black bean, red bean, black soybean, soybean, Rhynchosia volubilis, brown soybean, peeled mung bean, big soybean, green soybean, kidney bean and adlay； and 5-15 weight% of additive powder of yacon powder, barley sprout powder, Salicornia herbacea powder, and acorn powder. The functional instant cooked rice according to the present invention is manufactured by washing the mixed cereals, adding the additive powder, cooking rice and packaging the cooked rice at a fixed package unit. The functional instant cooked rice contains various nutrients including carbohydrate, protein, mineral and vitamin whereas the calorie is low, which improves health of a user with a balanced nutrition supply, and enables to help in improvement of physical constitution and prevention of lifestyle related diseases, especially to be useful in diet and to remarkably contribute to alleviation of the diabetes. Accordingly, the present invention is to produce a diet product having balanced nutrition by adding rice bran as well as other materials having various effect.본 발명은 영양학적 근거와 예상분석을 토대로 전체 칼로리는 낮추고 영양소와 면역력을 높이는 다이어트 식품을 제조함이다. 최근 현대인들의 무분별한 식사와 고열량 음식물의 섭취로 인하여 당뇨, 비만, 변비, 동맥경화, 고혈압 등과 같 은 성인병을 직접적, 간접적으로 유발하는 원인이 되고 있는 실정인 바, 쌀보리, 현미, 다시마현미, 늘보리, 진흑미, 흑미, 압맥, 할맥, 서리태, 적두, 흑태, 백태, 약콩, 밤콩, 깐녹두, 거두, 청태, 강낭콩, 율무의 혼합곡물 85~95 중량%와； 야콘 분말
