Nimaathap (also read as Nima'at-Hapi and Nihap-ma'at) was an Ancient Egyptian queen consort at the transition time from 2nd dynasty to 3rd dynasty. She is known to have enjoyed a long-lasting mortuary cult.
Nimaathap's name appears on clay seal impressions discovered mostly in the tomb of king (pharaoh) Khasekhemwy, the last ruler of the 2nd dynasty. Other seals were found at Beit Khallaf at the burial sites of the mastaba tombs K1 and K2; the relationships of the original tomb owners to Nimaathap are unknown, though. Her name also appears on stone slab fragments from Heliopolis. These show Nimaathap kneeling at the feet of pharaoh Djoser, together with Djoser's wife, queen Hetepheres and Djoser's daughter, princess Inetkaes. The relief is evaluated as proof that Nimaathap was still alive at that time and that she participated at least one Hebsed ceremony. Nimaathap's name does not appear in the pyramid necropolis of Djoser at Saqqara; there, her name was replaced by depictions of the god of grieve and mummies, Anubis.