An amorphous carbon film forming apparatus according to the present invention is characterized by being provided with a film forming furnace 11; plural workpiece fixtures 23 for supporting plural plate-like workpieces 22 in a state that the same are piled up vertically in parallel with the interval between facing surfaces of two vertically adjoining of the plate-like workpieces 22 being in a range of 2 to 30 millimeters, the plural workpiece fixtures 23 being arranged within the film forming furnace 11 at a regular angular interval on a circle and being connected to a negative electrode; nozzles 31, 32 provided for supplying a processing gas and including at least one nozzle arranged at a center of the circle on which the plural workpiece fixtures 23 are arranged and plural nozzles arranged at a regular angular interval on another circle which surrounds the workpieces fixtures 23 radially outside thereof; and a plasma power supply connected to at least the workpiece fixtures 23. By controlling the supply gas pressure to be in a range of 13 to 1,330 Pa and a sheath width to be made in a range of 2 to 30 mm, the discharge is kept stably. As a consequence, it can be realized to form amorphous carbon films efficiently at a low cost.