To facilitate every works such as processing, exchanging, adjusting, and inspecting of each parts, and lighten the whole of a device, and in particular achieve long life, miniaturization, and weight reduction of the device.

A column 10 of a cylindrical coordinate robot is rotatably provided with an expanding horizontal arm having a working hand part on an upper end of the vertically expanding column 10. The column 10 comprises; a first column 11 erected on a floor, opening a front peripheral wall surface, having right and left side walls and a back wall, and being a U-shaped in a plain cross section; a second hollow column 12 vertically movable in the inside and outside of the first column 11; and a third hollow column 13 disposed between the first column 11 and the second column 12, vertically movable along the outer peripheral surface of the second column 12, and having a rotating shaft part for the horizontal arm on a upper end thereof. On the second column 12, a driving device 20 is provided, which drives itself to vertically move in relation to the first column 11, and drives the third column 13 to vertically move in relation to the second column 12.