The paper deals with Roma persecution in the period of the Slovak state in 1938–1945. It primarily comes from archival documents present in regional, county and police office funds in State archive in Nitra. We can mainly find there nationwide orders of the Ministry of the Interior and some regional documents as well. The introductory part of the paper is devoted to general issues of the Roma holocaust in Slovakia and its current research. The second part brings information of the selection of Roma people and so-called asocial people to labour camps. The third part is devoted to camps and forced labour in the Slovak state.