The Mastaba of Kaninisut (or Ka-ni-nisut [Ka-nj-nswt]), or Mastaba G 2155, is an ancient Egyptian mastaba tomb, located at Giza in the West field of the Great Pyramid of Giza. The cult chamber of the mastaba is now on display in the Kunsthistorisches Museum in Vienna with inventory number 8006. Kaninisut was a high state official in the Fourth dynasty or early Fifth dynasty in the Old Kingdom (c. 2500 BC), as demonstrated by the location and size of his tomb and his numerous honorific titles. The cult chamber of Kaninisut was built of the best quality white Tura limestone and decorated with fine, raised reliefs, which mainly depict offerings, scenes of funerary ritual and Kaninisut with his family. Kaninisut's descendants built additional smaller tombs within the large mastaba.