Abū Saʿīd Kūchkūnjī, Muẓaffar al-Dīn Abū Saʿīd b. Kūchkūnjī (Kūchūnjī, Kūcham), Khān b. Abī al-Khayr Khān b. Dawlat Shaykh Ūghlān (d. 939/1532), was an Uzbek ruler of the Shaybānid dynasty (Zambaur, 403; Uzunçarşılı, 3(2)/260). His father was descended from the Tīmūrid dynasty through Mīrzā Ulugh Beg Gūrkānī, his maternal grandfather (Ghaffārī, 208; Nawāʾī, 194). Abū Saʿīd, the fourth ruler of the dynasty, was a contemporary of the Ṣafawid Ṭahmāsb I (r. 930–984/1523–1576).

After his father's death in Samarqand (936/1530), Abū Saʿīd succeeded his father and was made …