The research entitled “A Study of the Factors Influencing the Ethical Characteristics of   Suankularb  Wittayalai  School  Pupils in Burapapirom under  Phranakorn of Bangkok”  was aiming to   study   the factors   influencing the Ethical characteristics of   Suankularb  Wittayalai  School  Pupils and to study the factors Influencing the understanding of   Suankularb  Wittayalai  School  Pupils’ Ethics  in Burapapirom under  Phranakorn of Bangkok.  Data were collected   from  a  sample  including  637 pupils  in  level 3  (Grade 1-3)  and  level 4   (grade 4-6) of   Suankularb  Wittayalai  School  Pupils’ Ethics  in Burapapirom under  Phranakorn of Bangkok.  The tool of data collection was a  questionnaire.  Statistics used for data analysis included Percentage, Frequency, Mean, Standard Deviation,  t-test  and  One-way  ANOVA. The results of the study were as follows.

       1. Pupils’ ethical behavior was generally and individually moderate in the aspects of honesty, discipline, responsibility, social assistance and compassion.

           2. Pupils’ ethical behavior was not significantly different with the reliable rate of  95%, while individually considering it was found that the aspects of honesty, discipline, responsibility, social assistance and compassion were not significantly different  with the reliable rate of  95%.

        3. Grade 1, 2, 3, 4, 5, 6 pupils’ Ethical behavior was generally significantly different at  0.05 level,  while considering individually it was found that  the aspects of honesty, discipline, responsibility, social assistance and compassion were significantly different  at 0.05.

Suggestions were as follows:

         1. Administrators and teachers should make an effective plan to strengthen pupils’ Ethical behavior.

         2. The school should promote learning and teaching activities or other supplementary activities to enhance pupils’ opportunity of expression out such as  sports,  tourism,  nature conservation, Buddhist activities etc., because  these activities would strengthen pupils’ Ethical behavior.

         3. Pupils’ parents should be asked for cooperation in the strengthening of pupils’ Ethical behavior.