Abstract: Provided is a manufacturing method for efficiently manufacturing a thermoplastic resin composite containing a thermoplastic resin and a fiber by pultrusion. In the manufacturing method according to an embodiment, fibers 10 are continuously impregnated with a thermoplastic resin-forming composition containing an active hydrogen component and a diisocyanate component, after impregnation, the fibers 10 are caused to pass through a heat-molding unit 30 to perform polymerization of a thermoplastic resin and molding of a thermoplastic resin composite 12, and the thermoplastic resin composite 12 is continuously pulled out from the heat-molding unit 30. In the method, a heating temperature of the heat-molding unit 30 is set to be lower than a glass transition temperature of the thermoplastic resin, so that the thermoplastic resin of the thermoplastic resin composite 12 pulled out from the heat-molding unit 30 is in a glassy state.