Entemena, also called Enmetena (Sumerian: 𒂗𒋼𒈨𒈾, EN-TE-ME-NA; fl. c. 2400 BC), was a son of Enannatum I who re-established Lagash as a power in Sumer. He defeated Il in a territorial conflict through an alliance with Lugal-kinishe-dudu of Uruk, successor to Enshakushanna, who is in the king list. The tutelary deity Shul-utula was his personal deity. His reign lasted at least 19 years.

Entemena of Lagash controlled the cities of southern Mesopotamia, from Badtibira to Uruk:

"At that time, Entemena built and reconstructed the E-mush, his beloved temple, in Badtibira, for the god Lugalemush, (and) he set free the citizens of Uruk, Larsa, and Badtibira."

— Inscriptions of Entemena.

A clay nail found in Girsu commemorates the alliance which he concluded with Lugal-kinishe-dudu of Uruk, the oldest mention of a peace treaty between two kings that we know:

1st line:
^Dinanna-ra / ^Dlugal-e2-muš3-ra / en-mete-na / ensi2 / lagaški-ke4 / e2-muš3 e2 ki-ag2-ga2-ne-ne / mu-ne-du3 / KIBgunû mu-na-du11 / en-mete-na / lu2 e2-muš3 du3-a
2nd line:
^D-ra-ni / dšul-utul12-am6 / u4-ba en-mete-na / ensi2 / lagaški / lugal-ki-ne2-eš2-du7-du7 / ensi2 / unuki-bi / nam-šeš e-ak

1st line:
"For Inanna / and Lugal-emuš / Enmetena / ruler / of Lagaš, / the E-muš, their beloved temple, / built / and ordered (these) clay nails for them. / Enmetena, / who built the E-muš,"
2nd line:
"his personal god / is Šul-utul. / At that time, Enmetena, / ruler / of Lagaš, / and Lugal-kineš-dudu, / ruler / of Uruk, / established brotherhood."

— Alliance treaty between Entemena and Lugal-kinishe-dudu.