Frivilligt Drenge- og Pigeforbund (English: Voluntary Boy and Girl Association, FDF) is a Danish, Christian youth organisation with approximately 25,000 members as of 2009.

The Frivilligt Drengeforbund (English: Voluntary Boy Association) was established by Holger Tornøe, a young architect and Sunday school teacher from Copenhagen, and Ludvig Valentiner.

This organisation was founded on 27 October 1902 in Frederiksberg, and is Denmark's oldest uniformed youth association.

In 1974 the two merged to form a joint youth organization open to both girls and boys.

In 2011, the event attracted about 13,000 participants and more than 500 international guests from FDF's partner organizations took part.