This study were conducted to investigate the effect of horticultural activities on the sociability and eating habit for children seven years old in kindergarten. The two groups of preschool children 7 years, in 'M' kindergarten and in 'N' kindergarten, were objects of this research. The number of children were 22 and 7, respectively. The horticultural activities program were applied for 12 sessions in one time a week to 'M' kindergarten and for 15 sessions in one time a week to 'N' kindergarten. The results showed horticultural activities significantly improved sociability and eating habit. Especially the inclination for violence, injuring or beating, was reduced remarkably. Horticultural activities seem to be effective for understanding on natural phenomenon, involve the characteristics of a plant and an animal, and also for recognizing signification of nature life while children did horticultural activities. It was seem those positive effects lead improve sociability in their group. Horticultural activities had an effect on eating habit for children. Especially, It was seem that this effect, improving an unbalanced diet habit, arise from getting familar with vegetables while children cultured and cared themselves.