Born in Skopje (SR Macedonia, SFR Yugoslavia), Grnčarov began his career playing with FK Vardar.

Boban Grnčarov had played a total of 53 league matches, and scored 2 goals, at the time he left OFK Beograd.

After spending the first half of the 2006–07 season on loan to FC Stal Alchevsk, Grncarov signed a deal with KAA Gent in the Belgian Jupiler League.

During the winter break Grnčarov's contract was mutually terminated and after spending some time as a free agent, in mid January 2014 he joined Tavriya Simferopol in the Ukrainian Premier League.

[7] He made his senior debut for Macedonia in a December 2001 friendly match against Oman and has earned a total of 34 caps, scoring 1 goal against Norway on 9 September 2009.