Naghachu ( Naγaču|script=Latn; 納哈出; d. 1388), also written as Nahacu, was an ethnic Mongol leader and general of the Northern Yuan dynasty in Manchuria, which was under Liaoyang province of the former Yuan dynasty. Originally a Yuan official, he had won hegemony over the Mongol tribes in a wide area including much of Rehe (Jehol) and Liaoning by the mid-1380s. Now he grew strong in the northeast, with forces large enough (numbering hundreds of thousands) to threaten invasion of the newly founded Ming dynasty in order to restore the Mongols to power in China proper. Instead of waiting for the Northern Yuan to attack, in 1387 the Ming sent a military campaign to attack Naghachu and forced his surrender after a successful diplomacy of the Ming. Naghachu and thousands of his officers and relatives were sent to Nanjing, the capital of the Ming dynasty at that time. The Ming granted Naghachu himself a marquisate with a stipend of 2,000 piculs of grain, and estate of public fields in Jiangxi, and a mansion in Nanjing. He died near Wuchang on 31 August 1388, probably from overindulgence in alcohol, and was buried outside Nanjing.

納哈出（；約1320年 - 1388年），元末明初名臣，官至太尉，屬蒙古札剌亦兒氏。為成吉思汗四傑之一木華黎裔孫。初為太平路萬戶，元至正十五年（1355年），朱元璋攻克太平時被俘，因其為名臣後人之故，好言勸降，不歸順，念其心繫元廷，遂給予銀兩放歸。元順帝封其為丞相，後又封太尉。

元朝滅亡後，納哈出駐兵開元金山（今遼寧省昌圖金山堡一帶），計有二十萬之眾，繼續抵抗明朝。有史料稱其為開元王。洪武二十年（1388年），明將馮勝逼金山，納哈出無力抵抗，遂降。降後，封海西侯。次年，隨傅友德征雲南，途中病亡。後人獲罪，流寓閩南泉州，一般認為泉州的出姓即源于納哈出。

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