To open a hinged door outward of a hull to secure a large space on the side of a steering seat and to allow a steersman to easily perform fishing operations while sitting on the steering seat by enabling the rear of the bridge side of a bridge for ship controlling or the like to be opened and closed as the hinged door.

In this bridge structure, the bridge side 14 of a bridge 10 used for ship controlling or the like has its rear made openable and closable as a hinged door (side door) 20, and the side door 20 can be fixed at a certain set opening angle θ. At a position where the opening angle θ of the side door 20 is approximately 90 degrees, the outer form of the side door 20 extends along the shapes of a passage 18 and bulwarks 19 in a hull 1.