PURPOSE: To precisely position a lower pin-board, on which positioning pins for positioning a substrate are standingly provided, and an upper pin board by making the upper pin-board, on which a driver bit for CPU checking of a printed-wiring board on a conveyer is vertically provided, to be slidable forward and backward, and to the left and right.

CONSTITUTION: An upper pin-board 2 which is vertically slidable and a lower pin-board 23 fixed on a lower frame 24 are mutually faced to each other above and beneath a conveyer 6 which conveys a printed wiring board 18 and which is vertically slidably provided. The upper pin-board 2, on which a driver bit 14 for CUP checking of the board 18 is vertically provided, is slidably provided on an upper frame 3 in such a manner that a spacer 4 is fitted in a fitting hole of a bolt 5, which is fixedly provided on the upper frame 3, defining gaps t1 and t2 between the upper pin-board 2 and the bolt 5. The upper pin-board 2 and the conveyer 6 are lowered relative to a positioning pin 20 for positioning the board 18 and the lower pin-board 23 on which a CPU check pin 21 is vertically provided.