Nima-odsor (1894–1936) was an Inner Mongolian politician of the Republic of China, shot to death by assassins on an intercity bus ride.
His Mongolian name would be written in the Mongolian Cyrillic alphabet as Ням-осор (Nyam-osor). It was transcribed into Chinese as Chinese: 尼瑪鄂特索爾; pinyin: Nímǎ'ètèsuǒ'ěr. Newspaper reports transcribed these Chinese characters back into English with a variety of unusual spellings, including Ni-Ma-O-Teh-Su-Erh and Ne-Mo-Ngoh-Ta-U-Erh. He also used the Chinese name Ni Kuan-chou (Chinese: 尼冠洲; pinyin: Ní Guānzhōu).
Nima-odsor was a member of the Central Committee of the Kuomintang and of the Mongol Local Autonomy Political Affairs Committee. He was a close associate of Ünenbayan and Jodbajab. In January 1936, Nima-odsor, Ünenbayan, Serengdongrub, and Demchugdongrub went to Zhangbei for a meeting with Jodbajab. In that meeting, they discussed Jodbajab's deployment of cavalry police in six counties in northern Chahar Province (demilitarised by the Chin–Doihara Agreement in the wake of the North Chahar Incident) in response to Manchukuo troops' occupation of the area under Li Shouxin the previous month.