Chatmohar Mosque () also known as Masum Khan's Mosque () is a 16th century Mughal mosque situated at Chatmohar Bazar in Chatmohar Upazila in Pabna district. The mosque was constructed in 1582 AD by Khan Muhammad bin Tuwi Khan Qaqshal under Masum Khan Kabuli. It was repaired from ruins in the 1980s by the Department of Archaeology, and is now a protected monument.
The mosque constructed in 1582 (989 AH), is one of the earliest surviving Mughal monuments in Bengal, alongside the Kherua Mosque in Sherpur, Bogra. A Persian inscription, now preserved at Varendra Research Museum records that the mosque was commissioned by Masum Khan Kabuli, who assumed independence from Mughals and established Chatmohar as capital. Shortly after reconstruction by Department of Archeology, Bangladesh in the 1980's, the roof along with the domes had collapsed. Later, the mosque was renovated again and declared as a protected monument.
Built with small, thin latticework bricks similar to the Kherua Mosque in Bogra, the interior of Chatmohar Shahi Mosque is and high. The exterior of the mosque measures with wall thickness.