A traveling route structure of a conveying traveling body has a traveling route with an area intersecting a crossing aisle, and has a movable rail horizontally openable and closable between a connection working position that connects guide rails in front and rear of the crossing aisle and a retracting position lateral to the crossing aisle. The movable rail has front and a rear movable rails arranged in a line when the movable rails are in the connection working position. Each of the movable rails is pivotally supported so as to be horizontally rotatable about a vertical spindle at each outer end portion positioned outside of the crossing aisle. A locking means couples inner end portions of both movable rails together, with the inner end portions being adjacent to each other when the movable rails are in the connection working position.