Break Down is the debut Korean solo mini album of Kim Hyun-joong of South Korean boy band SS501. It was released on 7 June 2011 under KeyEast Entertainment. A Limited Edition was released on 23 June 2011, with a bonus DVD with music videos and behind-the-scene footages. The album was released in Taiwan by Warner Music Taiwan in two versions: Regular and Commemorate Editions.

SS501 is a South Korean boy band consisting of five members: Kim Hyun-joong, Heo Young-saeng, Kim Kyu-jong, Park Jung-min and Kim Hyung-jun. They debuted in 2005 with the EP Warning, which included their first number one song, "Never Again".