Ar Horqin Banner (Mongolian: ᠠᠷᠤ ᠬᠣᠷᠴᠢᠨ ᠬᠣᠰᠢᠭᠤ Aru Qorčin qosiɣu; simplified Chinese: 阿鲁科尔沁旗; traditional Chinese: 阿魯科爾沁旗; pinyin: Ālǔ Kē'ěrqìn Qí) is a banner of eastern Inner Mongolia, People's Republic of China. It is under the administration of Chifeng City, about 200 kilometres (120 mi) to the south-southwest. The banner lies on China National Highway 303, running from Ji'an, Jilin to Xilinhot, Inner Mongolia.