This research aims to study the comparative of classification choosing the career in undergraduatestudents after graduated. In this research used the data set of the status having the job of graduates, the data set of students undergraduate after graduation from Faculty of Informatics Mahasarakham University from 2007-2011 years. The total of data set has 12 attributes and 2,515 records. This research using techniques Decision tree,Artificial neural network and Naive bayes. The results from the model was showed that the highest accuracy is Decision tree with 80.67% And analyzed the factors affecting the career choice of
undergraduate students. The results showed that there are important factors that lead to career4 factors is GPA technicality branch Field of study, gender and overall GPA. Which results in this experiment can be applied to the relevant authorities. To plan for development, course structure, or plan your education to the students.