To provide a small-size and small-space gun-drilling machine with a collection circulation system for chips and a cutting liquid capable of certainly discharging the chips and the cutting liquid to a chip separation device.

In this gun-drilling machine with the collection circulation system, a stand is formed with a through hole just under a chip box. The cutting oil collection circulation system comprises a chip reception means disposed aslope below the through hole; a separation means for collecting and separating the chips and the cutting liquid discharged from a low position of the slope of the chip reception means; a coolant tank for storing the separated cutting liquid; and a pump means for supplying the cutting liquid in the coolant tank to the gun drill side. Because the collection circulation system is disposed under the stand, the gun-drilling machine is miniaturized. Because the collection circulation system also has a jet means for jetting the cutting liquid supplied from the pump means into the chip reception means, the separation means can certainly collect the chips and the cutting liquid.