To provide a work arranging device which enhances the efficiency for stacking lead frames or plate works, such as a printed board, with a piece of interlayer paper being interposed therebetween.

The work arranging device is provided with a work conveying belt 10 for conveying the lead frames 12 air-sucked to the lower surface of a feeding belt 10a; an interlayer paper conveying belt 20 which crosses with the belt 10 beneath the belt 10, for conveying pieces of interlayer paper 22 air-sucked to the upper surface of a belt 20a facing works; and a control unit for aligning each lead frame 12 with each piece of interlayer paper 22 to permit suction of the interlayer paper 22 to the lower surface of each lead frame 12, at the crossing position of the belt 10 and the belt 20, and for allowing the belt 10 to release the suction of the lead frames 12 and the interlayer papers 22 so as to be separated from the belt 10a for stacking and arrangement at work arranging positions S1, S2 located upstream of the belt 10 in respect of the crossing position.