To provide a piercing method for a seamless steel tube.

In a method for piercing the seamless steel tube, in this piercing method of the seamless steel tube, by working the tip part of a billet into a taper shape and working the shape of the inlet side of a roll into the same profile angle which is in accord with the tip shape of the billet, bitingness is improved. Moreover, the taper profile angle β of the tip part of the billet and the profile angle α of the inlet side of the roll are respectively taken as 1-4°.