The purpose of the present invention is to provide: a thermoplastic-resin-reinforcing sheet material which can accommodate even a high Vf value and does not curl; and a manufacturing process therefor. A thermoplastic-resin-reinforcing sheet material (1) is provided with: a reinforcing fiber sheet (2) which is composed of multiple reinforcing fibers arranged in parallel in a specified direction and which has a basis weight of 80g/m<2> or less; a fabric (3) which consists of a thermoplastic resin fibrous material having a fineness of 5.6 dtex to 84 dtex and which has a basis weight of 5g/m<2> to 90g/m<2>; and a bonding thermoplastic resin material (4) which melts or softens at a temperature lower than the melting temperature of the fabric (3) and with which the reinforcing fiber sheet (2) is discretely attached to the fabric (3).