To use a baggage holder also as a tray at a foot when being seated without placing a baggage on a seat cushion.

Frame support plates 20 to support a frame 10 of a U shape which is projected upward from a seat cushion 1 and erected and laid between an erecting position and a forward laying position are provided on both sides of a front part of the seat cushion 1, and a net 11 to function as a tray at the forward laying position is installed on the frame 10. A slit 21 to guide a hinge pin 12 at a middle position of a side part frame 10a free to vertically slide, a slit type stopper groove to slip down a stopper pin 14 formed on a base end part of the side part frame 10a to support the frame 10 at the erecting position, a circular arc guide groove 24 to guide the stopper pin 14 so as to revolve the frame 10 between the erecting position and the forward laying position with the hinge pin 12 as a fulcrum by inserting it in this groove through and a stopper to restrain the stopper pin 14 at a rear end part of the guide groove 24 so as to support it at the forward laying position are formed on the frame support plate 20.