Pirbrua is a bridge over the river Nidelva in Trondheim between Havnegata on Brattøra and Transittgata in Nedre Elvehavn. It was opened on 10 July 2009.
The bridge is part of the connection between the northern relief road and the planned new E6 Trondheim-Stjørdal. The bridge is constructed by architects Dissing + Weitling as a lifting bridge with five spans . It is controlled from the control tower at the Nidelv bridge.