[3] He made his acting debut in 2000 in theaters, since then, he has appeared in number of plays, films and television series.
He has acted in films such as: Vanishing Time: A Boy Who Returned (2016), Winter's Night (2018), Juror 8 (2019) among others.
[5][6] After his compulsory military service, Kim Hak-sun joined a pungmul troupe as a manager.
He debuted in 2002 in films with a role in Hong Sang-soo’s On the Occasion of Remembering the Turning Gate, and appeared in The Magicians (2005).
He also did some roles alongside his actress wife Kim Jung-young in Merry Christmas Mr. Mo and Oh!