A film adhering apparatus for adhering a protective film on a work piece includes a controller, a conveyor belt, a rotating bracket configured to assemble the protective film, a suction driving member, a sensor, a first suction member, a cutting assembly, and a moving assembly. When the work piece is sensed by the sensor, one end of the protective film is pulled by the moving assembly to pass by the first suction member, and the protective film is sucked by the first suction member. The moving assembly releases the protective film and reset to suck the protective film again, and the protective film is cut off by the cutting assembly. The suction driving member drives the first suction member to move toward the work piece and the protective film is adhered on the work piece.