Sanguantang Bridge, Steel truss bridge in Ningbo, Zhejiang, China.

Sanguantang Bridge is a 2.2 km steel truss bridge with a continuous system and a main span of 465 m, the world's longest for this type. It crosses the Yongjiang River between Yinzhou and Jiangbei districts in Ningbo, Zhejiang, passing over Lamei, Yongjiang and Fenghua roads.

Construction of the Sanguantang Bridge began on 22 December 2015. The main span was joined on 14 January 2020, and the bridge opened to traffic on 27 September 2020. It carries the crossing of the Yongjiang between Yinzhou and Jiangbei districts in Ningbo, Zhejiang.

The name comes from Sanguantang, the locality at the bridge's northern end in Jiangbei District, named after a hall dedicated to the Three Officials (Sanguan) of Daoist tradition. The crossing links the Yinzhou and Jiangbei banks of the Yongjiang, and its pair of ramps on the south side of Ningzhen Road feed traffic onto the approach.

The bridge is open year-round for pedestrians and vehicles and receives regular maintenance to ensure safety. Visitors should exercise caution during poor weather and use marked pathways when crossing.

Its 465-metre main span makes it the world's longest continuous steel truss girder bridge, a record held at its opening in 2020. The deck crosses the Yongjiang in one continuous run, with a pair of on- and off-ramps on the south side of Ningzhen Road.