Laser processing apparatus and method for manufacturing laser-processed product [as amended]

A laser processing apparatus that applies laser processing to a workpiece, comprising:

• a stage that receives the workpiece thereon;
• an outer peripheral wall portion that forms a hollow space inside thereof and is disposed so that the hollow space extends from a side closer to the stage toward a side farther from the stage;
• a cylindrical wall portion that has a cylindrical shape and is disposed in the hollow space to sectionalize the hollow space into an inner space located inside the cylindrical shape and an outer space located outside the cylindrical shape;
• an irradiation unit that emits laser light so that the laser light passes through the inner space from the farther side toward the closer side and irradiates the workpiece;
• a transparent member that is provided so as to close the inner space at a position on the farther side away from an end portion of the cylindrical wall portion located on the closer side;
• and
• a lid member that has a first opening and is disposed so as to close the outer space between the cylindrical wall portion and the outer peripheral wall portion, wherein
• the outer space communicates with an aspiration device, the laser processing produces dust, which is aspirated through the first opening and the outer space, and a cross-sectional area of a channel of the first opening is smaller than a cross-sectional area of a channel of the outer space between the cylindrical wall portion and the outer peripheral wall portion, and
• the cylindrical wall portion has a second opening at a position on the side closer to the stage than the transparent member is.