A thermoplastic resin prepreg characterized in comprising at least: a constituent element (I) which is 20-60 weight parts of a thermoplastic resin (A) having a linear or branched polymer structure; a constituent element (II) which is 2-10 weight parts of a thermoplastic resin (B) which is unevenly distributed to a surface site and has a melting point lower than that of the thermoplastic resin (A); and a constituent element (III) which is 30-78 weight parts of reinforcing fibers, also, a molded preform and a molded composite using the same, and methods for producing them. When thermoplastic resin prepregs are stacked together or when a thermoplastic resin prepreg is used in insert-molding, the present invention makes it possible to efficiently enhance the surface adhesiveness of the prepreg without causing a reduction in mechanical properties, and makes it possible to ensure a desired adhesiveness during molding of the molded preform and molded composite.
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