To provide a screw-driven carrying device with a highly accurate spiral slit capable of performing accurate positioning control even when a carrying body loading an object and travelable by being supported and guided by a guide rail by a pair of right and left wheels is stopped or carried in the opposite direction and having a reduced size as a whole in an easy-to-manufacture manner.

In the screw-driven carrying device 100, the travelable carrying body 120 loading the object and supported and guided by the guide rail 102 by the pair of right and left wheels 121 is engaged with a spiral engagement part and carried by rotation of a screw shaft 110, wherein the screw shaft 110 includes a columnar shaft body 112, a cylindrical member 114 having a continuous spiral slit 115, and a plurality of rib plates 116-119 concentrically holding the cylindrical member 114 to the shaft body 112, and the plurality of rib plates include axial rib plates 118 extending in the axial direction of the screw shaft 110.