Drilling tool for chip removing machining, comprising a basic body, in which it is included: a) front and rear ends (4, 5) and an envelope surface that includes two countersunk chip flutes and is concentric with a first centre axis, around which the basic body is rotatable in a given direction of rotation, a loose top, in which it is included: b) front and rear ends (10, 11), the rear one of which forms an axial contact surface, as well as a pair of envelope part surfaces concentric with a second centre axis, and two chip flutes countersunk in relation to the pair of envelope part surfaces and between which two bars projecting radially from a central core are delimited that in the front end include a cutting edge each and at least one clearance surface (30, 31, 32) positioned rotationally behind the cutting edge, wherein a total length of the loose top is between a tip of the cutting edge and the axial contact surface, c) two opposite side contact surfaces, d) a pair of convex guide surfaces situated axially behind the side contact surfaces, which guide surfaces are concentric with the centre axis and radially spaced-apart from the centre axis at a distance that is less than the radial distance between the centre axis and the individual side contact surface, and e) a pair of torque-carrying tangential contact surfaces that are situated radially inside the envelope part surfaces and outside the side contact surfaces, the front end of the basic body comprising a jaw that is delimited by a bottom serving as an axial support surface against which the axial contact surface of the loose top is pressable, as well as two peripherally situated branches that protrude axially from the bottom, are elastically bendable, and have the purpose of clamping the loose top in an operative end position in the jaw, more precisely by a pair of inner support surfaces of the branches being resiliently pressed against the side contact surfaces of the loose top, and a pair of rotationally heading tangential support surfaces of the branches being pressable against the tangential contact surfaces of the loose top, besides which axially behind the inner support surfaces concave guide surfaces are arranged for co-operation with the two convex guide surfaces of the loose top, and the loose top being axially insertable into the jaw of the basic body and turnable to and from an operative end position, in which the tangential support surfaces of the branches are pressed against the tangential contact surfaces of the loose top, characterized in that the axial contact surface of the loose top extends perpendicular to the centre axis of the loose top, and continuously between borderlines adjacent to the two envelope part surfaces, and that a greatest diameter between the pair of concave guide surfaces of the branches is greater than an analogous diameter between the pair of convex guide surfaces of the loose top in order for the guide surfaces, on one hand, to provisionally hold the loose top in an intermediate position during the turning-in toward the operative end position, but, on the other hand, lack contact with each other in the last-mentioned position. a) front and rear ends (4, 5) and an envelope surface that includes two countersunk chip flutes and is concentric with a first centre axis, around which the basic body is rotatable in a given direction of rotation, b) front and rear ends (10, 11), the rear one of which forms an axial contact surface, as well as a pair of envelope part surfaces concentric with a second centre axis, and two chip flutes countersunk in relation to the pair of envelope part surfaces and between which two bars projecting radially from a central core are delimited that in the front end include a cutting edge each and at least one clearance surface (30, 31, 32) positioned rotationally behind the cutting edge, wherein a total length of the loose top is between a tip of the cutting edge and the axial contact surface, c) two opposite side contact surfaces, d) a pair of convex guide surfaces situated axially behind the side contact surfaces, which guide surfaces are concentric with the centre axis and radially spaced-apart from the centre axis at a distance that is less than the radial distance between the centre axis and the individual side contact surface, and e) a pair of torque-carrying tangential contact surfaces that are situated radially inside the envelope part surfaces and outside the side contact surfaces,