A conveying apparatus has a conveying traveling body traveling below a floor board and supporting a carriage main body by column portions penetrating a slit provided in the floor board. The conveying traveling body is composed of a plurality of trolleys. A load bar couples the trolleys, and a strip cover plate covers the load bar below the slit. The strip cover plate has a length longer than the conveying traveling body and has one end portion in the traveling direction provided with a movable plate portion higher than the other end portion. The movable plate is pivotally supported so as to be swingable upward from a horizontal posture.