This study is an attempt to investigate the probable roles of extrovert-introvert personality towards speaking performance of the 2013 academic year students of English Education Study Program in FKIP UNTAN. To achieve such a purpose, 33 students were selected on the basis of availability sampling procedure and their personality type was determined by using Mark Parkinson Personality Questionnaire. Then the writer summarized and analyzed students' midterm speaking scores. The personality and the students score were correlated by using Pearson Product Moment. The result of t-test revealed that there is statistically significant difference between the personality types of the participants' speaking performance. There is also a different learning style between the introvert and extrovert students, introvert students prefer to study alone while the extroverts prefer to participate and study in group. Hopefully this research can be useful for achieving more effective English teaching and learning process.