Alpinia galanga belongs to family Zingiberaceae commonly known as Khulanjan and also mentioned as Tigliyoonin in Unani classical literature. It is used in various unani formulations such as Habbe Jadwar, Jawarish Jalinoos, Arq Khulanjan etc. It has been used by Unani physicians since ancient times for the treatment of various ailments such as Bakhrul Fam (Ozostomia), Nafkh-e-shikam (Flatulance), Waj-ul-Mafasil (Arthritis), Zeeq-un-Nafas (Asthma), Salsul Baul (Incontinence of Urine). The main constituents identified in the rhizome are 1, 8-cineole, fenchyl acetate and β–pinene. Diverse pharmacological studies of Khulanjan have been reported to prove its Mufarreh (Exhilirant), Mutayyib-e-Dehan (Aromatic), Muhallil-e-Auram (Anti-inflammatory), Musakkin (Analgesic) and Kasir-e-Riyah (Carminative) property. This review summarizes the information described in classical Unani text and scientific research conducted on different parts of Khulanjan plant.