A multi-layer panel is provided, which may eliminate local portions having low strength and low rigidity and may suppress a stress concentration to increase rigidity and strength. The multi-layer panel includes a core panel a pair of face plates sandwiching the core panel from both sides and a beam member. The core panel has a standing portion extending in a direction intersecting with a surface of the multi-layer panel, and a flange formed in a manner of extending from a most outside end of the standing portion along a first one of the face plate. The beam member includes a portion with the rectangular cross section disposed so as to clamp the flange of the core panel with the first face plate.
