Changbin
A rapper, singer, songwriter, and record producer who is a member of Stray Kids and the production sub-unit 3Racha.
Seo Chang-bin (born August 11, 1999), known mononymously as Changbin, is a South Korean rapper, singer, songwriter, and record producer. He is a member of the South Korean boy group Stray Kids, formed by JYP Entertainment in 2017. He is also a member of 3Racha, an in-house production team and sub-unit of Stray Kids. 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, Thai rappers F.Hero and Milli. Changbin became a full member of the Korea Music Copyright Association in February 2023.
- Affiliation
- Stray Kids, 3Racha
- Debut Year
- 2018
- Birth Date
- August 11, 1999
Verified Timeline
Lore & Background
Changbin's journey began when he joined JYP Entertainment through an audition where he danced to a self-produced song. During his trainee period, he teamed up with fellow JYP trainees Bang Chan and Han to form the production team 3Racha, releasing multiple mixtapes under the pseudonym SpearB. They uploaded their first mixtape, J:/2017/mixtape, consisting of seven tracks, to SoundCloud. In 2017, Changbin participated in JYP's survival show Stray Kids and was confirmed to debut with eight other contestants. Throughout the show, he demonstrated his rapping and music composition skills, with several of his written songs included in the pre-debut EP Mixtape. He officially debuted with Stray Kids through a debut showcase and the EP I Am Not on March 26, 2018. In 2020, Changbin participated as a contestant in Show Me the Money 9. He passed the 1st Round but was eliminated in the 60 Seconds Team Trial. He went viral for his Jutdae (Korean: 줏대; lit. 'principles; strong spine; backbone') meme, which was featured in a 2022 Samsung Galaxy advertisement. In February 2023, Changbin and Han were promoted to regular membership in KOMCA, joining Bang Chan, who had already been a regular member since 2021.
In Their Own Story
The studio lights hummed softly in the dead of night, casting long shadows across the mixing console. Changbin adjusted his headphones, eyes focused on the waveform pulsing before him. It was just another session where silence felt louder than noise, waiting for the perfect beat to drop. He tapped a rhythm against his knee, feeling the vibration travel through the floorboards, connecting him to the music he was building from scratch.
Reader's Guide
Seo Chang-bin was born on August 11, 1999, in Yongin, South Korea. He graduated from Bora High School and studied at Gukje Cyber University in the Department of Entertainment. He joined JYP Entertainment through an audition where he danced to a self-produced song. During his trainee period, Changbin teamed up with fellow JYP trainees Bang Chan and Han to form the underground rap group 3Racha, releasing multiple mixtapes under the pseudonym SpearB, without the company's knowledge. They uploaded their first mixtape, J:/2017/mixtape, consisting of seven tracks, to SoundCloud. In 2017, Changbin participated in JYP's survival show Stray Kids and was confirmed to debut with eight other contestants. He officially debuted with Stray Kids through a debut showcase and the EP I Am Not on March 25, 2018. In February 2019, Changbin featured on "You... Like the Wind", a side track from Yoon Ji-sung's debut album. In 2020, Changbin participated as a contestant in Show Me the Money 9. He passed the 1st Round but eliminated in the 60 Seconds Team Trial. On October 28, 2021, Changbin featured on the song "Mirror Mirror" by Thai rappers F.Hero and Milli. The song won Best Collaboration awards from Thailand's Toty Music Awards and The Guitar Mag Awards. In February 2023, Changbin, along with his fellow 3Racha members Bang Chan and Han, was promoted to regular membership in KOMCA and, as of April 2025, has credits for 181 songs. On October 15, 2024, Changbin was featured on the song "VAY" from Itzy's ninth EP Gold, for which he also wrote the lyrics and composed the music. In September 2025, he featured on "R&B Me" by Jun. K from the EP Dear My Muse. In May 2024, he made his Met Gala debut with Stray Kids as the guest of Tommy Hilfiger. On February 26, 2026, footwear brand Autry announced Changbin as its inaugural brand ambassador. On February 16, 2023, Changbin donated ₩100 million (equivalent to ₩100 million or US$73,500 in 2025) through the international relief organization The Promise to aid the relief efforts following the earthquake in Turkey and Syria. His contributions led to his appointment as a member of the Honors Club on March 30. Changbin donated another ₩100 million (equivalent to ₩100 million or US$73,500 in 2025) to Samsung Medical Center on August 11, 2025 to celebrate his 26th birthday. On August 11, 2026, Changbin donated ₩100 million again to Samsung Medical Center in celebration of his 27th birthday. On September 1, 2023, Changbin released a single titled "Fly High" for the promotion of Samsung Galaxy Z Flip 5. On February 5, 2024, he featured in the release of another promotional single, Kim Chang-wan's "8th Grader (Respect Your Dreams)", for Samsung Galaxy S24.
Did You Know?
- Changbin was born on August 11, 1999, in Yongin, South Korea.
- He graduated from Bora High School and studied at Gukje Cyber University in the Department of Entertainment.
- During his trainee period, he formed the production team 3Racha with Bang Chan and Han under the pseudonym SpearB.
- He went viral for his 'Jutdae' meme from Show Me the Money 9, which was featured in a 2022 Samsung Galaxy advertisement.
- Changbin became a full member of the Korea Music Copyright Association in February 2023, while Bang Chan had already achieved this status in 2021.
Frequently Asked Questions
Who is Changbin?
Seo Chang-bin, born on August 11, 1999, is a South Korean rapper, singer, songwriter, and producer. He debuted in 2018 as a member of the boy group Stray Kids and is also part of their production sub-unit, 3Racha.
What are Changbin's specific roles within the group?
Changbin serves primarily as one of the main rappers while simultaneously leading the songwriting and production efforts alongside his 3Racha partners. His contributions extend to composing lyrics and beats for many of Stray Kids' tracks, making him a core creative force.
Is Changbin part of any other teams besides Stray Kids?
Yes, he is a founding member of 3Racha, the in-house production team responsible for creating much of the group's original music. This sub-unit allows him to focus on his skills as a songwriter and record producer alongside Bang Chan and Han.
Has Changbin released any solo work or collaborations?
Changbin gained significant attention as a contestant on the rap competition show Show Me the Money 9, which highlighted his individual rapping prowess. He has also collaborated with various artists such as Yoon Ji-sung, F.Hero, and Milli outside of his group activities.
Why is Changbin considered important to Stray Kids' identity?
He is crucial because he writes or co-writes the majority of the group's discography, defining their unique sound and lyrical themes. His official registration with the Korea Music Copyright Association in February 2021 further cemented his status as a professional producer.
Elsewhere in the Stray Kids universe
Spotted an error? Know more?
This is a living reference — every entry is fact-audited, and reader corrections feed straight into our audit queue. Suggest an edit · See this site's audit record