A manufacturing work machine including a beam member arranged in an X-axis direction of an XY horizontal plane, both ends of the beam member being supported to be movable in the Y-axis direction; a Y-axis drive device provided on one drive side end section of the beam member, the Y-axis drive device being configured to move the beam member in the Y-axis direction; and an X-axis drive member configured to move a work head provided on the beam member in the X-axis direction, wherein the beam member is a tube with an internal hollow running through in the X-axis direction, and is formed such that a beam width in the Y-axis direction is uniform, and a height direction dimension becomes smaller from the drive side end section to an end section on another side.