Ralf Rainer Hübner (born May 3, 1939, Berlin) is a German jazz percussionist.
Hübner attended the Hochschule für Musik in Berlin (1958–1962), studying both double bass and drums there and playing with Benny Bailey and Nathan Davis.
Upon graduating he joined the quintet of Albert Mangelsdorff, with whom he continued to perform and make recordings until 1971.
At the same time, he was invited to join the Jazzensemble des Hessischen Rundfunks, also directed by Mangelsdorff and in which he would work up to 2010.
In 1978 he recorded in a trio with Michel Pilz and Itaru Oki and with Volker Kriegel.