Go Soo, also known as Ko Soo, is a South Korean actor. He has appeared in television series such as Piano, Green Rose and Will It Snow for Christmas?, as well as the films White Night and The Front Line.

Piano (Korean: 피아노) is a 2001 South Korean television series starring Cho Jae-hyun, Go Soo, Kim Ha-neul and Zo In-sung. It aired on SBS from November 21, 2001 to January 10, 2002 on Wednesdays and Thursdays at 21:55 for 16 episodes.