To provide a lap belt auxiliary device for transporting baggage which is suitable for the transportation of a package or the like being the baggage, and transportation such as home delivery operation that a corrugated box and a parcel or the like are loaded and unloaded and conveyed to general home frequently.

The lap belt auxiliary device for transporting the baggage is configured by providing a horizontal receiving plate at one side of a lap belt so that a load can be placed, the receiving plate being a baggage transporting auxiliary tool that can be folded vertically when it is not used, and making the lap belt have a buckle being a fastening implement for attaching and detaching a belt, and then fixing a supporting plate that supports the receiving plate to be foldable on the outside surface of the buckle while extending and providing an abutting plate for receiving the reaction of weight caused when the load is placed at an inside lower part of the buckle.