Choi Jae-Soo (Korean: 최재수,崔在洙; born 2 May 1983) is a South Korean footballer who plays as full back for Gyeongnam FC. On 22 October 2009, he was discharged from the army and returned to FC Seoul. Choi officially signed a two-year contract with Ulsan Hyundai for an undisclosed fee on 26 January 2010.