Lee Chae-un is a professional footballer from KOR and is currently 17 years old. At international level, he features for South Korea U15. His main role on the pitch is Forward.

During the EAFF U15 Men's Championship 2025 campaign, Lee Chae-un made 3 appearances, scoring 0 goals and adding 0 assists. He averaged 0 goals per match from 0 shots, with 0 on target.