Working machine

A working machine including:

• a left side wall and a right side wall, wherein the left side wall and the right side wall are both erected on a bed,
• a forward/backward saddle movable in forward and backward directions, a left side of the forward/backward saddle being movably supported on the left side wall, and a right side of the forward/backward saddle being movably supported on the right side wall,
• a respective forward/backward drive device arranged on each of the left and right side walls, to move the forward/backward saddle in the forward and backward directions,
• a left/right saddle arranged on the forward/backward saddle and movable in left and right directions,
• a respective left/right drive device arranged on the forward/backward saddle on each of a forward and a backward side of the left/right saddle, to move the left/right saddle in the left and right directions,
• an up/down slider movable up and down and arranged on the left/right saddle,
• a lower portion of the up/down slider being provided with a processing head to which a processing tool for processing a work set on the bed is removably and replaceably attached, and
• a respective up/down drive device arranged on the left/right saddle on each of a left and a right side or on each of a forward and a backward side of the up/down slider, to move the up/down slider up and down,
• wherein the left/right drive device arranged on the forward side of the left/right saddle, and the left/right drive device arranged on the backward side of the left/right saddle, are at different levels in the up and down directions.