[1] The club was founded in 1919 as a Serbian-French sports society under the name Association Sportive Bor (ASB).

First ASB's head coach was Gallois, who also played for the club as well as for France national football team.

This was the most successful club in the area of the Eastern Serbia and achieved good results in the Serbian football competitions during the war.

BSK and another local team Rudar merged in early 1945, to form a club with the name of Radnički.

Next year, the club officially changed its name to FK Bor and was engaged in the first organized post-war competitions.

In the round of 16, they eliminated the top side FK Radnički Niš in an away match by 2–3, with two goals in the extra time.

Vojvodina, who were crowned Yugoslav Champions just one year ago, was a clear favorite to win the game.

However, backed by some 10,000 home supporters, Bor pulled off a 2–1 victory and qualified for a final with Yugoslav and European powerhouse Red Star Belgrade.

After three seasons in the top division they were relegated in 1971, but immediately bounced back, finishing the 1971–72 Second League in front of Priština and eliminating Rudar Ljubija and FK Crvenka in the playoffs.

They reached the quarter-finals of the 1970–71 Yugoslav Cup where they were again defeated by the eventual winner Red Star Belgrade.