A vehicular-use door comprising a first panel and a second panel bonded to a panel bonding part of the first panel, wherein the first panel is provided with a plurality of ribs, sticking out from the panel bonding part so as to cross the adhesive coated on the first panel or the second panel, along the coating direction of the adhesive, and each rib is provided with a non-visible part which is bonded to the second panel and which is covered by the second panel and can no longer be viewed from the outside and a visible part which extends from the non-visible part in a direction crossing the adhesive and which is not covered by the second panel and can be viewed from the outside.