The authors describe the discovery of the first human burial of Magdalenian age to be found in the Iberian Peninsula—the partial skeleton of a young adult whose bones were stained with red ochre. The burial was well stratified in a sequence at the vestibule rear running from the Mousterian to the Mesolithic, and was adjacent to a large block that had fallen from the cave roof and been subsequently engraved. A preliminary AMS radiocarbon date on associated faunal remains from the ochre-stained, galena speckled burial layer yielded a date of 15700 BP, while a hearth directly above the burial is dated to 15 100 BP, placing the interment of this individual in the Lower Cantabrian Magdalenian, the period of most intensive human occupation of El Mirón Cave during the Upper Palaeolithic.