The purpose of this study was to assess the nature of bullying on the school bus. Videotapes were used to identify occurrences of bullying on buses of elementary school students. Incidents were reviewed for forms of bullying, fullness, presence of friends, and severity of acts. Results indicated that approximately two incidents occurred per bus ride and that both frequency and severity differed by bus fullness. Gender differences were observed for types of bullying; however, the presence of friends was not found to be protective for either gender. Implications for bus safety and future research are discussed. (Contains 1 note.)