To prevent to hurt the cutting surface of a material to cut owing to the contact of the saw tooth, when a circular saw advancing to cut an aluminum alloy, a copper alloy, and an extension copper article, is retreated, as to a table switching method of metal cutter moving the circular saw forward and rearward along the running passage of a movable table, and a metal cutting saw machine utilizing the movable table switching method.

In this structure utilizing a table switching mechanism, a movable table is arranged to the fixed bed 11 of a bed body 1 by dividing it into two parts, a running passage to move forward and rearward a circular saw 12 is formed at the opposite side surface of the divided tables 2 and 2', and a moving mechanism 25 in order to approach and separate the movable tables 2 and 2' each other in the direction orthogonal to this running passage is provided between the bed body 1, and the movable tables 2 and 2'.