is a term which originally indicated the head of an institution serving temporarily as the head of another one, but which came to mean also the full-time head of some institution. The Kamakura period samurai Wada Yoshimori, for example, was the first bettō of the shogunate's Samurai-dokoro.
Betto is a surname. Notable people with the surname include:
- Alice Betto (born 1987), Italian triathlete
- Frei Betto (born 1944), Brazilian writer and theologist
- Kaoru Betto (born 1920), Japanese baseball player