PURPOSE: To improve production efficiency by performing automatic machining through the automatic feed and output of a plurality of sets of printed boards.

CONSTITUTION: A printed board machining device comprises a machining device A to machine a printed board 1 placed on a table 3, a falling and rising device B supported to the table 3 such that it is capable of falling and rising and delivering the printed board 1, a stack pin clamp device J attached to the table and positioning the printed board 1 attached to the table 3, a conveying device C attached along the front edge of the falling and rising device B and conveying the printed board 1, and a stacker device D connected to the one end of the conveying device C and containing the printed board 1. Further, the printed board machining device is provided with a cylindrical sucking device E located above the table 3 and cleaning chips, a conveying device F laterally traversed as it holds the printed board, a conveyor device G receiving the printed board 1 from the conveying device F to output the printed board, and a control device H to perform control of operation of each device.