Provided is a buffer which prevents damage to a lower edge of a baggage gateway of a baggage-containing section and which is not easily worn down or damaged when rubbed by baggage. The buffer includes a fixing section, a contact section, and a connecting section. At a vehicle-interior-side end of the connecting section, a lower surface of the connecting section is provided at a height obtained by subtracting (a) a thickness, in a vertical direction, of the vehicle-interior-side end of the connecting section from (b) a height, in the vertical direction, measured from the surface of the lower edge to a first top portion. At a vehicle-exterior side end of the connecting section, the lower surface of the connecting section is provided at a height obtained by subtracting (a) a thickness, in the vertical direction, of the vehicle-exterior-side end of the connecting section from (b) a height, in the vertical direction, measured from the surface of the lower edge to a second top portion.