Hasan Kuchak or Ḥasan-i Kūchik (Persian: حسن كوچك; c. 1319 – 15 December 1343) was a Chupanid prince during the 14th century.
The Jalayirids under Hasan Buzurg had recently mastered western Persia, putting a puppet Muhammad Khan on the Ilkhanid throne in 1336.
Claiming his father was alive, he used a slave named Qara Jari (a possible offspring of Hasan's grandfather Chupan) to impersonate him.
Following this, Hasan raised Sati Beg, sister of Abu Sa'id and widow of Chupan, to the Ilkhanid throne in the summer of 1338.
When Togha Temur, another claimant to the throne, invaded from Khurasan in the winter of 1339 at the behest of Hasan Buzurg, the Chobanid offered Sati's hand to him in marriage.
As a result of Jahan Temür's being raised to throne by Buzurg, Kuchak found a new suitable male puppet in the form of Suleiman Khan, whom he forced Sati Beg to marry in May 1339.
These forces were defeated by Hasan Kuchak's brother Malek Asraf in the latter half of 1341, and Surgan was soon imprisoned and sent to Karahisar in deep Anatolia.
Malek Ashraf, along with his cousin Pir Hosayn and his uncle Yagi Basti, were involved in a conflict that also included the Injuids, the owners of the area, and the Jalayirids.