A thermal transfer dye image-receiving sheet capable of receiving clear, uniform colored images without a formation of curls and wrinkles therein, comprising (A) a substrate sheet composed of (a) core sheet having a Young's modulus E.sub.3, (b) a front coated thermoplastic film layer having a thickness T.sub.1 and a Young's modulus E.sub.1, and (c) a back coated thermoplastic film layer having a thickness T.sub.2 and a Young's modulus E.sub.2, the T.sub.1, T.sub.2, E.sub.1, E.sub.2 and E.sub.3 satisfying the following relationships (1) and (2):T.sub.2 .gtoreq.T.sub.1 (1)andE.sub.3 .gtoreq.2E.sub.1 .gtoreq.2E.sub.2 (2)wherein Y.sub.1, Y.sub.2 and Y.sub.3 are determined in accordance with ASTM D882-64T.