Begu Hajjam's Mosque stands on the eastern side of Khajekalan Ghat. The mosque is named after a Barber called Begu Hajjam.

It is situated in the Khawaja Kalan Ghat Road of Patna City. The mosque was built by one Khan Muazzam Nazir Khan during the reign of Alauddin Shah Sultan of Gaur ( in the year 1509 AD. It was rebuilt by one Begu Hajjam. The distinctive features of the mosque is its glazed tiles as was popular in Gaur those days. The doorway with fine carvings is another important feature of the mosque. An inscription affixed in the mosque records details of its construction,