阿拉善盟
Ejin or Ejina (Mongolian: Эжэн-э қосиу "Ejen-e qosiɣu"; ) is a banner in the far west of Inner Mongolia, China. It is under the administration of Alxa League and is the westernmost county-level division of Inner Mongolia, bordering Gansu province to the west and the Republic of Mongolia's Bayankhongor and Govi-Altai Provinces. Its seat is located at Dalaihob Town (). To the west, it shares a border with Subei Mongol Autonomous County of Jiuquan, Gansu.