With recent increases in demand for women`s social participation, children have tended to favor western-style foods and dislike vegetables (Veg.). The objective of this study was to evaluate dietary behavior and Veg. intake in 612 elementary school children (339 boys; 273 girls) in Gyeonggi-do. 66.5% of the subjects reported that they liked Veg. The most frequent reason given for this preference in Veg. liking group was that vegetables were `delicious` (35.6%), followed by `nutritious` and `frequent intake`. The most frequent reason given for disliking Veg. in the Veg. disliking group was that vegetables are `not delicious` (94.6%). Approximately half of the subjects had correct knowledge about vegetables. The total score of general nutrition knowledge was 7.7 points (a perfect score is 10 points) and the majority of students generally had good dietary behaviors. The Veg. liking group scored higher on knowledge about Veg., general nutritional knowledge, dietary behavior, and Veg. preference than did the members of the Veg. disliking group (p＜0.001). The ‘active’ group had the highest score for dietary behavior (p＜0.001), and the scores for dietary behavior and Veg. preference increased with increasing self-rated health status (p＜0.001). The score of normal BMI group for nutritional knowledge about Veg. was higher than that of the underweight group (p＜0.05). The higher self-rated academic score group showed higher on knowledge about Veg., general nutrition knowledge, dietary behavior (p＜0.001) and Veg. preference (p＜0.05). Dietary behavior and preference of Veg. were positively correlated with nutritional knowledge. To improve health by increasing Veg. intake, education about the nutritional importance of Veg. should be needed, and continuous nutritional education is recommended to foster good food habits and Veg. preferences in children.