Belgium in the Eurovision Song Contest 1965

Belgium was represented by Lize Marke, with the song "Als het weer lente is", at the 1965 Eurovision Song Contest, which took place on 20 March in Naples. Marke was chosen internally to be the Belgian representative, and the song was chosen in the national final on 13 February. Marke had previously finished second in the Belgian preselection in 1963.

There was a minor controversy after the selection when it came to light that "Als het weer lente is" had previously been performed on TV (by the following year's Belgian representative Tonia), but after some deliberation broadcaster BRT decided not to disqualify the song, as none of the rules of the European Broadcasting Union in effect at the time regarding song selection had been broken.