BtoB (Born to Beat) (Hangul: 비투비) is a South Korean boy group formed in 2012 by Cube Entertainment. The group debuted on March 21, 2012, performing on M! Countdown with "Insane" and "Imagine". They released their first full-length album, Complete, in 2015. The fandom name came into being on May 15, 2012 and is called Melody, brought into being by member Ilhoon who said in an interview, "Our group name 'BTOB' means 'Born to Beat', And the only thing that goes well with the musical beat is the melody. So i came up with this suggestion." 

The group was formed by Cube Entertainment. It was stated from the start that Seo Eunkwang, Lee Minhyuk, Lim Hyunsik, Jung Ilhoon and Lee Minwoo were on the list of original members who are waiting to be debuted under the name of "BtoB". They appeared on the JTBC sitcom "I Live in Cheongdam-dong" as an aspiring boy band working towards their debut. However, Lee Minwoo had dropped out of the list of confirmed members after their first appearance on the sitcom.

Subgroups consist of "BtoB Blue" with members Eunkwang, Changsub, Hyunsik and Sungjae, formed in September 2016 and "BTOB U" with members Eunkwang, Minhyuk, Peniel and Changsub, formed on November 16, 2020.

On December 31, 2020 it was announced via Cube Entertainment that member Ilhoon would be leaving the group. Serving in military at the time it is uncertain what Ilhoon plans to do after release.

On October 18, 2023 it was announced that BTOB would be separating from Cube Entertainment, it was also said that the group would be staying together

Former Members include Lee Min Woo (M) and Jung Ilhoon