The Tregiffian Burial Chamber (Cornish: Hirvedh Treguhyon) is a Neolithic or early Bronze age chambered tomb. It is near Lamorna in west Cornwall, United Kingdom (grid reference SW430244). It is a rare form of a passage grave, known as an Entrance grave. It has an entrance passage, lined with stone slabs, which leads into a central chamber. This type of tomb is also found in the neighbouring Isles of Scilly.