Seo Chang-bin, known mononymously as Changbin, is a South Korean rapper, singer, songwriter, and record producer under JYP Entertainment. He is a member of the boy group Stray Kids and its sub-unit 3Racha.

Besides his contributions to Stray Kids, Changbin participated as a contestant in Show Me the Money 9 and has collaborated with various artists, including Yoon Ji-sung and Thai rappers F.Hero and Milli. Changbin became a full member of the Korea Music Copyright Association (KOMCA) in February 2023.