The Busan Subway Map is very useful if you are travelling, living in or Exploring Busan. The Busan Subway System is made up of 5 lines. Line 1 (Orange), line 2 (Green), line 3 (Gold), line 4 (Blue) and the Busan – Gimhae light rail.
Generally the first trains start between 5:10 am and 6:10 am and last trains stop around 23:30 – 12:30. This of course depends on the station and line. For full information about the Busan Metro, check out the official site http://www.subway.busan.kr/english/main/
Busan Subway Map