The purpose of this study was to analyze the dietary habits by age groups, based on the nutrition counseling data of medical health examination. The subjects were 5,811 adults(3,258 males and 2,553 females) who took comprehensive medical test in Gyeonggi area, and they were evaluated from January 1 to December 31 in 2005. Survey samples were divided by age groups 30>, $30{sim}39,;40{sim}49,;50{sim}59,;60{sim}69,;70{leq}years$. The subjects were composed of 56.1% male and 43.9% female. The results showed that the dietary habits of $50{sim}59$ group were relatively good. On the other hand, in 30>, $30{sim}39;and;40{sim}49$ age groups, since they had irregular meals and high ratio of skipping breakfast. and they had meals out frequently, nutritional unbalance in these age groups was expected for the future. Therefore the correct nutritional facts should be taught to them so that they have a healthy dietary habit.