The objectives of this research were to study the success level of doing a thesis of the postgraduate students of Suan Sunandha Rajabhat University and to examine the factors affecting the success. This research utilized a quantitative research approach. The research sample was 256 graduates. Data were collected with the use of a questionnaire and analyzed with descriptive statistics including percentage, mean, standard deviation, and multiple linear regression. In terms of the sample’s profile, it was found that most of them were female (58%), around 31-40 years old (46%), graduated from the Performing Arts Program (64%), and worked as a government employee (46%). The research findings also revealed that all the studied independent variables or the factors affecting the success in doing a thesis of the students were overall rated at the highest level. When considering at each factor, it was found that factors including thesis advisors, students’ self-management, students’ academic knowledge were rated at the highest level whereas academic service offered by the university was rated at a high level. This study also revealed that the factors affecting the success in doing a thesis included the thesis advisors and students’ self-management, with a .05 level of statistical significance.
Keywords: Factors; Success in Doing a Thesis, Postgraduate Students