The present disclosure provides a foaming adhesive sheet having: a first adhesive layer; a base material; and a second adhesive layer in the stated order. The first and second adhesive layers contain a curable adhesive. At least one of the first and second adhesive layers further contains a foaming agent. The tack of the first adhesive layer is 0 gf or more but is less than 10 gf and the tack of the second adhesive layer is 10-500 gf. The loop stiffness of the sheet is at least 50 mN/10 mm.

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