A transporter bridge (also ferry bridge or aerial transfer bridge) is a type of movable bridge that carries a segment of roadway across a river. The gondola is slung from a tall span by wires or a metal frame. The design has been used to cross navigable rivers or other bodies of water, where there is a requirement for ship traffic to be able to pass. This has been a rare type of bridge, with fewer than two dozen built. There are just twelve that continue to be used today, including one converted into a lift bridge and one designed as, but not yet operating as, a transporter bridge.

The concept of the transporter bridge was invented in 1873 by Charles Smith (1844-82) the manager of an engine works in Hartlepool. He called it a "bridge ferry" and unsuccessfully presented his ideas to councils in Hartlepool, Middlesbrough and Glasgow.

The first transporter bridge, Vizcaya Bridge was built in Portugalete in Spain, in 1893. The design from Alberto Palacio inspired others to attempt similar structures. The idea found use where it was seen as impractical to build the long approach ramps that would be required to reach a high span, and in places where ferries are not easily able to cross. Because transporter bridges can carry only a limited load, the idea was little used after the rise of the automobile.