Daowai Mosque, Islamic center in Daowai District, Harbin, China.

Daowai Mosque is a mosque in Daowai District, Harbin, Heilongjiang, and the largest in the province. Its wooden structure is assembled without nails using mortise and tenon joints, combining upturned eaves and carved timber with Islamic design. The central prayer hall, opposite the main gate, covers 426 square metres and holds up to 600 worshippers.

Construction began during the Guangxu Emperor's reign in the Qing Dynasty and was completed in 1897. A major renovation and expansion took place in 2003.

The mosque is described in Russian sources as a Tatar mosque, serving Harbin's Tatar Muslim community, and it is the largest mosque in Heilongjiang province. Its architecture combines Islamic, Russian and Chinese elements, such as upturned eaves and decorative carvings, a mix a visitor can see on the exterior.

The building is accessible by bus, with several routes running nearby and morning hours offering the best conditions for visiting. Visitors should be aware that prayer times are observed and respectful conduct is expected.

The mosque is described as a Tatar mosque, reflecting the Volga Tatar community that settled in Harbin. Its wooden frame was assembled without a single nail, using mortise and tenon joints, a technique a visitor can look for in the timberwork.