To provide a slide type desk cutting-machine, which is in no danger of damaging processed objects and gives good dust collection efficiency.

A rubber plate like chip guide member 21 to guide chips to an exhaust 14a is fixed in horseshoe setting through a plate 22 inside a cutting blade unit 14 in lower back position to a saw blade 30 of the cutting blade unit 14. The chip guide member 21 is shaped to extend lower than the peripheral tangent to the cutting blade 30 when the cutting blade unit 14 is pushed down to the lower limit, provided that the peripheral tangent is extending from the intersection of the top face of a turntable 4 and the cutting blade 30.