The problem to be solved by the present invention is to provide an adhesive multilayer sheet including an adhesive layer that includes an acid-modified polyolefin and a substrate layer that includes a polyphenylene ether, and having high interlayer peel strength. The multilayer sheet of the present invention includes: a substrate layer (A) that includes a polyphenylene ether; and an adhesive layer (B) that includes an acid-modified polyolefin, in which the multilayer sheet further includes, between the substrate layer (A) and the adhesive layer (B), a tie layer (C) that includes a polyolefin/polyphenylene ether-based alloy.