Laser processing apparatus

A laser processing apparatus comprising:

• a laser processing apparatus main body configured to radiate pulsed laser light from inside of a cylindrical body through a slit-shaped gap region provided in the cylindrical body onto a long, thin film, while the thin film is wound obliquely around the cylindrical body provided with the gap region having a shape of a circular arc along a circumferential surface and is transferred in a longitudinal direction of the thin film, and continuously create numerous through holes in the thin film;
• and a dust collector provided adjacent to the cylindrical body of the laser processing apparatus main body and configured to suck in and remove processing dust generated from laser processing, characterized in that
• the dust collector includes a suction port part disposed to face the gap region of the cylindrical body and configured to suck in the processing dust, a dust collection part arranged successively with respect to the suction port part and configured to collect the processing dust sucked in from the suction port part, and a dust collection air pump connected to an outer circumference side of the dust collection part and configured to suck out the processing dust remaining in the dust collection part to outside.