Frank Bello (born July 9, 1965) is an American musician who plays bass for the thrash metal band Anthrax.

[3] Bello has referred to Paul McCartney, Steve Harris, Gene Simmons, Geezer Butler, Geddy Lee, Chris Squire, Tom Petersson and Jaco Pastorius as influences and inspirations to his bass playing.

[5] In May 2021, Bello announced the forthcoming publication of his autobiography, Fathers, Brothers, and Sons: Surviving Anguish, Abandonment, and Anthrax.

[10][11] He also played a small role as a stick-up man in Joe's Apartment, and appeared in the intro scene in the Law & Order episode "The Brotherhood", credited as "Rocker".

In the early days on Anthrax, Bello used an ESP Precision-styled bass, possibly a 400 series, that had EMG P-bass and J-bass pickups.

[3] After constant touring with Megadeth's bass player, David Ellefson, Bello switched to a Hartke LH1000 and HyDrive cabinets.

[15] Later in the year they released a Pro-Mod Mexican made version [16] In 2023 Tech 21 release a Frank Bello signature SansAmp, the Street Driver 48 [17] Bello has shown support for Little Kids Rock, a national nonprofit that works to restore and revitalize music education in disadvantaged U.S. public schools, by donating several bass guitars and amps to 15 New York City public schools.

He also visited a Little Kids Rock classroom to show encouragement to young musicians, answer their questions, and jam with them on their favorite songs.