This research The objective is to study the factors affecting the self discipline of students attending secondary school year Office District of phetchabun district primary education 3 to find variables in predicting the self-discipline of students. Using the population of high school students, 3 Office zones phetchabun District 3 primary education the academic year number 2559 1,472 people sample the number of 360 people, a tool used in this research is the research queries created. Number one as the query type, scaling, interpolation (Rating Scale) 5 levels of khoet 2 episode 1 factors affecting the self discipline of students and episode 2 discipline in students ' self. Data analysis of the variables affecting self discipline By finding the arithmetic mean and standard deviation values. Analysis the relationship between the variables of the prophecy with the self-discipline of students attending secondary school year using the formula, Pearson's correlation coefficient (Pearson's product moment correlation coefficient), and multiple regression model coefficients analysis procedure (Stepwise Multiple Regression Analysis) to select significant variables to create the best forecast equations by using regression statistics multiple (Multiple regression analysis).