International Friendlies
The victory follows last week's emphatic 5-0 win over Trinidad and Tobago, giving Hong Myung-bo's side a confidence booster ahead of their Group A opener against Czechia.
With Son Heung-min and Lee Kang-in starting on the bench, Korea Republic controlled possession and created several chances in the opening half but failed to break the deadlock.
Hwang In-beom tested the goalkeeper with an early free-kick, while Lee Ki-hyuk and Lee Dong-kyung both went close.
The breakthrough arrived 11 minutes into the second half when Lee Dong-kyung bent a left-footed free-kick over the wall and into the top-right corner, leaving El Salvador goalkeeper Mario Gonzalez with no chance.
Hong made sweeping changes shortly after the goal - introducing Son, Lee Kang-in, Oh Hyeon-kyu, Jens Castrop, Yang Hyun-jun, Paik Seung-ho, Park Jin-seop and Kim Jin-kyu.
However, the East Asian side could not add to their lead, with Castrop and Lee Kang-in both denied late on.
Photos: AFP
