This paper describes lecturers' behaviors and beliefs regarding social media in higher education at the Faculty of Education, Mahasarakham University. Thirty-one lecturers were surveyed about their attitudes toward the use of social media in their classes. Their responses were analyzed using arithmetic mean and standard deviation. The results are as follows: 1) The most frequently used social media were YouTube, Facebook, and Slideshare. 2) The lecturers believed that social media were easy to use and saved time and money for online courses; furthermore, they reported that social media could be a tool for teaching, enhancing collaborative learning, and improving project abilities.