Site RJ-1 at Raʾ s al-Jinz is located on the top of a mesa that overlooks site RJ-2 (from the second part of the third millennium BC). Excavations have uncovered a long chronological sequence in a large area of anthropological deposits which are never more, and often less, than 50 cm deep. This area includes circular huts of the late fourth millennium BC, a village of stone houses from the first half of the third millennium BC, several Umm an-Nar type burials that make up the graveyard of site RJ-2, a fish-processing area of the same period, and a Wadi Suq village, thus covering the whole evolution and the major social and economical changes that occurred at the beginning and at the end of the Early Bronze Age, between 3000 BC and 2000 BC. The results are presented with a particular focus on the excavation of Tomb 1 (c. 2500-2300 BC), which reveals new data on the burial customs of the time. When studied in conjunction with the settlement at RJ-2, these results shed new light on some critical issues in the archaeology of Early Bronze Age Oman.