Busan Subway Line 2 (coloured green) is the second line of the metro system in Busan. As of 2005, the line is 40 km long. The line uses 28 vehicles, each one having six cars.
Although construction on the first section—a 22.4-km route, with 21 stations, between Hopo and Seomyeon—began in 1991, it was not opened until June 30, 1999. The line was extended 8.7 km southeast from Seomyeon to Geumnyeonsan on August 8, 2001. It was extended 0.9 km north to Gwangan on January 16, 2002, and finally, on August 29, 2002, it was extended 8 km east to Jangsan.
Currently, Line 2 is being extended north from Hopo to the Bugjeong area in Yangsan.