Ryszard Przewlocki (born October 25, 1943) is a Polish neurobiologist and neuropharmacologist, professor of medical sciences, professor at the Institute of Pharmacology of the Polish Academy of Sciences, a member of the Polish Academy of Learning and Academia Europaea, and one of the most frequently cited Polish scientists in the field of biomedicine after 1965, who in his youth was also an actor of experimental theatre Teatr 38 in Kraków, and episodically a film actor.