An Sung-Min made his professional debut with Busan I'Park in 2007, and would stay a further two seasons. He played a total of 38 matches in the K-League in his time with Busan, scoring 3 league goals. He also made a number of appearances for the club in the Korean domestic cup competitions. For 2010, Ahn moved to Daegu FC. In July 2011, he related 2011 South Korean football betting scandal.