A surface-protective PSA sheet capable of reducing adherend damage and well maintaining appearance, etc is provided. The surface-protective PSA sheet capable of reducing adherend damage and well maintaining appearance, etc., comprises a surface layer, a resin substrate layer and a PSA layer, and has a multilayer structure with the resin substrate layer placed between the surface layer and the PSA layer, wherein the surface layer is a layer obtainable by curing a heat-curable composition comprising the following components:



(a) a hydroxyl group-containing (meth)acrylic copolymer having a glass transition temperature of −40° C. to 30° C.;
(b) an allophanate polyisocyanate and/or a biuret polyisocyanate; and
(c) a polysiloxane comprising a hydroxyl group-containing hydrocarbon group and/or polymer.