The purposes of this research were : 1) to study ethical characteristics of students at Makham Sansern School from Makham District in Chanthaburi.
2) to compare students’ levels of ethical behaviors at Makham Sansern School. This study was critically classified by personal factors, family environment and social surrounding. The sample groups of this study were 165 students at Makham Sansern School. The data were gathered through a questionnaire and analyzed with statistical techniques, including percentage, mean, standard deviation, t-test, F-test and Scheffe’s test.