SUCTION CUP FOR FILM SUBSTRATE

PROBLEM TO BE SOLVED: To provide a suction cup for a film substrate capable of sucking and holding a printing surface of the film substrate without damaging the printing surface and preventing lowering of a suction function due to leakage of air from a part of suction holes from affecting the whole of the suction cup. SOLUTION: The suction cup is formed into a rectangular shape corresponding to an outer peripheral end part of the film substrate and is provided with a suction surface 62 with many opened suction holes 62. The suction surface 62 is divided into four or more areas so that the four corner parts may be included in each different area S1, 2, 3 and 4 and is connected to a suction source via a suction path independent for every area S1, 2, 3 and 4. Preferably, when suction force is increased by making distribution density of the suction holes 63 at the corner parts to be vital points for a holding action larger than that of the suction holes 63 except the corner parts, a sucking and holding action of the film substrate is further improved.