An Chang-ok

Career An made her international debut at the 2017 Junior Asian Championships where she finished 15th in the all-around.

An became age-eligible for senior competitions in 2019. She made her senior debut at the 2019 Doha World Cup, but she did not qualify for any finals. Her best result was 17th place on the uneven bars. Then at the 2019 World Championships, she helped the North Korean team place 20th in the qualification round. She finished 60th in the individual all-around qualification. She helped the North Korean team win the bronze medal behind China and Japan. Individually, she qualified for the all-around final and finished sixth. Then in the event finals, she won the gold medals on both the vault and uneven bars.

An registered for the 2024 FIG World Cup series to compete on vault and attempt to qualify for the 2024 Olympic Games. At the Cairo World Cup, she performed a double-twisting Yurchenko and stuck a Cheng vault to win the gold medal. She won another gold medal at the Cottbus World Cup. At the Baku World Cup, she won the silver medal behind Bulgaria's Valentina Georgieva and mathematically secured an Olympic quota. She then won the silver medal at the Doha World Cup behind Panama's Karla Navas. She was the 2024 World Cup series vault champion.

An represented North Korea at the 2024 Summer Olympics where she placed fourth in the vault final behind Simone Biles, Rebeca Andrade, and Jade Carey.

Competitive history +Competitive history of An Chang-okYearEvent 2017 Junior Asian Championships 15 2019 World Championships 20 2023 Asian Games 6 2024 Cairo World Cup Cottbus World Cup Baku World Cup Doha World Cup Olympic Games 4 2026 Asian Championships 4 5 5