To provide a workpiece conveying device small in size and light in weight without having two kinds of large and heavy driving means such as a driving means for moving up/down and a driving means for rotational movement.

The workpiece conveying device 1 comprising a gripping tool 20 for gripping a window 5 being a workpiece and a support arm 10 for movably supporting the gripping tool 20 conveys the window 5 gripped by the gripping tool 20 to window frames 7a, 7b (a rear window frame 7a, a front window frame 7b) to be assembled with the window 5 by the support arm 10 and changes an attitude of the window 5 to a suitable attitude for the window frames 7a, 7b. The support arm 10 is composed to be a closed loop linkage in which a plurality of links 11, 12, 13 and 14 are connected to form a closed-loop shape. An attitude of the gripping tool 20 to either link 13 or 14 of a pair of the links 13, 14 connected to the gripping tool 20 of the support arm 10 can be fixed.