| Mandahai | |
| Prince Xun of the First Rank Chinese: 和碩巽親王 | |
| Succession: | Prince Xun of the First Rank |
| Reign: | 1648–1652 |
| Reign-Type: | Tenure |
| Predecessor: | Daišan (as Prince Li of the First Rank) |
| Successor: | Canggadai |
| Birth Date: | 30 April 1622 |
| Spouse: | Lady Borjigit Lady Irgen Gioro |
| Issue: | Chang'adai, Lengsaiyi |
| House: | Aisin Gioro |
| Full Name: | Mandahai (滿達海) |
| Posthumous Name: | Prince Xunjian of the First Rank (巽簡親王) (revoked in 1659) |
| Father: | Daišan |
| Mother: | Lady Yehe Nara |
Mandahai (Manchu: ᠮᠠᠨᡩᠠᡥᠠᡳ, ; 30 April 1622 – 15 March 1652), was an imperial prince of the Qing dynasty and one of Nurhaci's grandson. He was the seventh son of Daišan and in 1649 he inherited his father's princedom. He was posthumously honoured as Prince Xunjian of the First Rank (巽簡親王).
Mandahai was born in the Aisin Gioro clan on 30 April 1622 as the seventh son of Daišan.
His mother was Daišan's princess consort Lady Yehe Nara, who also bore the eighth son, Hūse.He would join his father and uncles in military campaigns. He accompanied his father to the siege of Jinzhou in 1640. In the following year, he was given the title of bulwark duke. He participated in the Battle of Shanhai Pass under Dorgon, which was a decisive battle leading to the beginning of Qing dynasty rule in China proper. Mandahai was promoted for his services to the rank of Prince of the Fourth Rank in 1644. In the next year, he joined his uncle, Ajige, in pursuit of the rebel leader Li Zicheng.
In 1649 he inherited his father's princedom. The peerage was renamed to Prince Xun of the First Rank. He was posthumously honoured as Prince Xun Jian of the First Rank (巽簡親王). His posthumous rank was demoted and name changed to a title of a beile.
After his death, Mandahai was accused of confiscating a part of Dorgon's property and was posthumously demoted. His son, Canggadai, was demoted to a prince of the third degree.
Primary Consort
Secondary Consort
Concubine