The purposes of this study were: 1) to studied of knowledge about snack consumption 2) to studied the behavior of snack consumption 3) to studied the association between personal factors or behavior of snack consumption 4) to studied the relationship between family factors or behavior of snack consumption and 5) to studied the association between the knowledge or the snack consumption behavior of middle school students in Thepmitrsuksa School Surat Thani Province. Samples were the middle school students in Thepmitrsuksa School Surat Thani Province that were studying in 2sd semester of academic year 2016 of 301 students. The Research instrument was a questionnaire. The statistics used to data analysis such as; frequency value percentage value average standard deviation and the Chi-squared test that were performing the data analysis used to SPSS statistics. The results of research were found: 1) most of students had highly knowledge about snack consumption 2) the students behavior of snack consumption sometimes had the behavior of snack consumption that consumed candies more than anything else. 3) the association between personal factors such as sex age habitation characteristics amount was being received characteristics from guardian and amount was being received characteristics from the guardian with snack consumption behavior of middle school students in Thepmitrsuksa School Surat Thani Province there were associated statistically significant at 0.05 however the association between personal factors in grade level of study there were not statistically significant in association with snack consumption behavior at .05. 4) the relationship between family factors such as education of guardian and the size of family with snack consumption behavior of middle school student in Thepmitrsuksa School Surat Thani Province that will have found the relationship were statistically significant at .05. and 5) the knowledge about snack consumption behavior of middle school students in Thepmitrsuksa School Surat Thani Province that will has been finding the association was statistically significant at .05.

The objectives of this research were to study the snack consumption behavior of vocational education students certificates level as relate to sex age education level income knowledge of snacks and to study relationship of different levels of knowledge of snacks to sex age and education level of vocational education students certificate level. Sample of 267 home economics students ages 16-18 years home in Kanchanaburi Suphanburi and Nakhonphathom were randomly selected by stratified random sampling. All data were colleted by questioners and analyzed through percentage mean standard education chi – square T – test and F – test. The results of this study indicated that the snack consumption behavior of vocational education certificate level studied in the western Region Vocational Education Institutes had medium level of knowledge about snack. Sex age education level and different income were not significantly related to snack consumption behavior. Different sex and age did not contribute to knowledge levels about snacks.