A thermoplastic resin finely-foamed reflective sheet, containing: a foamed layer; and non-foamed layers, each of which has a thickness of 150 μm or less and 30 μm or more, and which are provided one above the other while sandwiching the foamed layer between the non-foamed layers, wherein the thermoplastic resin finely-foamed reflective sheet has an integrated structure, wherein the foamed layer is a thermoplastic resin finely-foamed product having a homogeneous bubble structure, in which an average bubble diameter is 10 μm or less and 0.5 μm or more, and in which a bubble number density is 1×106/mm3 or more and 1.0×1012/mm3 or less, and wherein at least one of the non-foamed layers comprises a functionality-providing layer.