In Chang-soo (; born 23 November 1972) is a former South Korean footballer and coach. He holds Argentine citizenship. In was born in South Korea. When he was a child, he emigrated to Argentina. His Argentine name is Diego. Club career In Chang-soo played for E-Land Puma during 1994 and 1995. Managerial career In 2006, he started his coaching career in Ansan Hallelujah. On 5 December 2017, he was appointed as manager of Seoul E-Land. In 2019, In was appointed as assistant manager of South Korea under-20 team. With them, he was the runner-up at the 2019 FIFA U-20 World Cup. References 1972 births Living people South Korean footballers Argentine footballers South Korean football managers South Korean emigrants to Argentina Association football defenders Seoul E-Land FC managers Pocheon Citizen FC players