Dual-fuel injector adapted to be arranged in a dual-fuel injection equipment of an internal combustion engine, said dual-fuel injector generally extending along a main axis, from a top-head to a nozzle-tip, and internally accommodating a first circuit for conveying a first fuel from a first inlet to a first set of injection holes provided in the nozzle tip and, a second circuit for conveying a second fuel from a second inlet to a second set of injection holes provided in the nozzle tip, the dual-fuel injector further comprising, - a first control-valve arranged to control the pressure of the first fuel in a first control chamber thus forcing the opening, or closing, of a first valve member enabling, or forbidding, injection of the first fuel via the first set of injection holes and, - a second control-valve arranged to control the pressure of the first fuel in a second control chamber thus forcing the opening, or closing, of a second valve member enabling, or forbidding, injection of the second fuel via the second set of injection holes, the first valve member being concentrically guided in a bore provided inside the second valve member and wherein, the injector further comprises: a first inlet body arranged in the head of the injector and axially extending from an upper face to a transverse under face, and being provided with the first inlet, the under face of the first inlet body being in surface contact against the second control valve and, a second inlet body axially extending from a transverse upper face to an opposed transverse under face, the first control valve being arranged in a recess provided in said upper face of the second inlet body and, a first capnut bearing on a shoulder face of the first inlet body and being firmly tightened on the second inlet body, thus fixing in axial co-alignment the two control valve compressed between the two inlet bodies and, a barrel member and a nozzle assembly, the upper face of the barrel member being in surface contact against the under face of the second inlet body and, the under face of said barrel member being in surface contact against the upper face of the nozzle assembly and wherein, the second control chamber is defined in said barrel member. - a first control-valve arranged to control the pressure of the first fuel in a first control chamber thus forcing the opening, or closing, of a first valve member enabling, or forbidding, injection of the first fuel via the first set of injection holes and, - a second control-valve arranged to control the pressure of the first fuel in a second control chamber thus forcing the opening, or closing, of a second valve member enabling, or forbidding, injection of the second fuel via the second set of injection holes, the first valve member being concentrically guided in a bore provided inside the second valve member and wherein, the injector further comprises: a first inlet body arranged in the head of the injector and axially extending from an upper face to a transverse under face, and being provided with the first inlet, the under face of the first inlet body being in surface contact against the second control valve and, a second inlet body axially extending from a transverse upper face to an opposed transverse under face, the first control valve being arranged in a recess provided in said upper face of the second inlet body and, a first capnut bearing on a shoulder face of the first inlet body and being firmly tightened on the second inlet body, thus fixing in axial co-alignment the two control valve compressed between the two inlet bodies and, a barrel member and a nozzle assembly, the upper face of the barrel member being in surface contact against the under face of the second inlet body and, the under face of said barrel member being in surface contact against the upper face of the nozzle assembly and wherein, the second control chamber is defined in said barrel member. a first inlet body arranged in the head of the injector and axially extending from an upper face to a transverse under face, and being provided with the first inlet, the under face of the first inlet body being in surface contact against the second control valve and, a second inlet body axially extending from a transverse upper face to an opposed transverse under face, the first control valve being arranged in a recess provided in said upper face of the second inlet body and, a first capnut bearing on a shoulder face of the first inlet body and being firmly tightened on the second inlet body, thus fixing in axial co-alignment the two control valve compressed between the two inlet bodies and, a barrel member and a nozzle assembly, the upper face of the barrel member being in surface contact against the under face of the second inlet body and, the under face of said barrel member being in surface contact against the upper face of the nozzle assembly and wherein, the second control chamber is defined in said barrel member.