Abstract—The objectives of this research were 1) study on  the parenting style effects on vegetable having behavior of small children 2) to study vegetable having behavior of small children and 3) to study the relation between parenting style and vegetable having behavior of small children. The samples used include the parents of 120 small children both male and female studying in pre-kindergarten level of preschool training center, Wat Phetsamut at Maeklong Sub-district, Mueng District, Samutsongkhram Province. Statistics used in the analysis were percentage, mean, standard deviation and the relation between parenting style and vegetable having behavior of small children by Pearson’s coefficient. The research found that the parenting style with attention is in high level (=4.40), the parenting style with control and the parenting style with indulgence are in the intermediate level (=3.33) and  = 2.56) respectively and the parenting style with abandon is in low level )  (=1.86). Vegetable having behavior of small children found that the most are in intermediate level = 3.35). The relation between parenting style of parent and vegetable having behavior of small children found that parenting style with attention and control have positive relation to vegetable having behavior of small children but parenting style with indulgence and abandon have negative relation to vegetable having of small children.