Rinchinbal (Mongolian: Ринчинбал ᠷᠢᠨᠴᠢᠨᠪᠠᠯ, Chinese: 懿璘質班; Standard Tibetan: རིན་ཆེན་དཔལ།), also known by his temple name as the Emperor Ningzong of Yuan (Chinese: 元寧宗; May 1, 1326 – December 14, 1332), was a son of Kuśala (Emperor Mingzong) who was briefly installed to the throne of the Yuan dynasty of China, but died soon after he was installed to the throne.

His mother was Babusha of the Naiman tribe, who met Kusala when he lived in exile in Central Asia under the Chagatai Khanate.

Tugh Temur made his son Aratnadara heir apparent in January 1331.

When Tugh Temur's widow and El Tegüs's mother Budashiri Khatun respected Tugh Temür's will of making Kuśala's son succeed the throne, the 6 year old Rinchinbal was chosen.

He had no choice but to invite Toghun Temür back from far-away Guangxi[4] in southwest China.