Kaoru Betto (?? ?, Betto Kaoru, born August 23, 1920 in Nishinomiya, Hyogo) was a Nippon Professional Baseball player.
After playing for the Osaka Tigers for two years, Betto played for the Mainichi Orions from 1950 to 1957.
In his first season with the Orions, Betto won the NPB's first Pacific League MVP Award and helped lead the team to victory in the first Japan Series.
A T-shirt featuring a cartoon image of Kaoru Betto was worn by Jeff Bridges' characters in at least 3 films, including The Fisher King, Cold Feet, and The Big Lebowski.