a fiber reinforced thermoplastic resin sheet which has no warpage , higher fiber orientation or randomized fiber orientation , manufactured by supplying a dispersion containing reinforcing fibers and a thermoplastic resin from an inlet onto a moving endless mesh belt and by continuously forming a web in the shape of a sheet while subjecting the dispersion to suction and filtration , is disclosed . the method and apparatus of manufacturing the same by means of controlling the speed ratio and the distribution of the suction amount of the aqueous medium are also disclosed .