Bjørn (Björn, Bjorn) Nielsen (4 October 1907 – 21 May 1949) was a Danish chess master.

He played for Denmark in Chess Olympiads: He won individual gold medal at Munich 1936.

[1] In 1933, he tied for 6-7th in Copenhagen (Politiken, Aron Nimzowitsch won),[2] In 1941, he tied for 5-6th in Munich (Europaturnier, Gösta Stoltz won).

He also shared 1st in 1949 but died in Herning before the play-off against Poul Hage could take place.

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