| Ghiyath al-Din غیاث الدین محمد بن سام | |
|---|---|
| Shamsuddin Ghiyasuddin | |
 Statue of Ghiyath al-Din Muhammad in Dushanbe | |
| Sultan of the Ghurid Empire | |
| Reign | 1163 – 11 February 1203 |
| Coronation | 1163 |
| Predecessor | Sayf al-Din Muhammad |
| Successor | Muhammad of Ghor |
| Born | 1140 Turqoise Mountain, Ghor (present day Ghor Province, Afghanistan) |
| Died | 13 March 1203 Herat (present day Herat Province, Afghanistan) |
| Burial | |
| Issue | Ghiyath al-Din Mahmud |
| Father | Baha al-Din Sam I |
| Religion | Sunni Islam |
Ghiyath al-Din Muhammad (Persian: غیاث الدین محمد بن سام), also known as Ghiyath al-Din Ghori or Ghiyassuddin Ghori born, Muhammad (c. 1140–1203, r. 1163–1203), was the Sultan of the Ghurid dynasty. During the diarchy of Ghiyath and his younger brother Muhammad of Ghor, who governed the eastern realm of the Ghurid Empire, the Ghurids emerged as one of the greatest powers of the eastern Islamic world.
During his early reign, he defeated the Ghurid claimants to the throne and fought with the Khwarazmian Empire over the lordship of Khorasan. He occupied Ghazna and Herat by 1175 CE and went on to establish control over most of what is now Afghanistan and the surrounding areas by 1200, and as far west as Bastam and Gurgan. His brother, Mu'izz al-Din, helped manage and expand the eastern part of the empire (as far as Bengal) and served Ghiyath with utmost loyalty and deference. Ghiyath died in 1203 and was succeeded by Mu'izz al-Din.