This volume contains the proceedings of the international congress Russulales 2010, held in Massembre (Heer-Agimont, Belgium) from 7-12 September 2010. The congress was organised by the "Association des Mycologues Francophones de Belgique (AMFB)". It brought together some one hundred mycologists, both amateur and professional, whose fields of interest included systematics, ecology, floristics and chorology of Russulales (Basidiomycota, Fungi). The programme included lectures, excursions, workshops, identification sessions with the microscope, and an artistic session.