Blood puncture head intended to equip a mechatronic assembly such as a robotic arm, of an automatic or semi-automatic blood sampling machine configured to allow movement of said head above a limb of a patient to be punctured, said blood puncture head comprising: - a frame equipped with means for removably fixing the frame to said mechatronic assembly, - a needle holder carried by said frame and adapted to receive a needle comprising a beveled portion intended to pierce the skin of the patient's limb to be punctured and a rear portion intended to allow the flow of collected blood to a collection tube, characterized in that said blood puncture head further comprises: - linear displacement means of said needle holder configured to allow, once the latter is equipped with a needle, to arm the puncture head with a view to inserting, on command from said mechatronic assembly, this needle in said limb of said patient in order to be able to take a blood sample, - a device for fluidically connecting said rear portion of said needle mounted on said needle holder with a collection tube intended to collect the blood taken from said patient's limb, said fluidically connecting device being motorized and further comprising a device for loading and distributing blood collection tubes comprising at least one housing for receiving a collection tube and at least one securing actuator of this collection tube to the rear of a needle mounted on said needle holder, said securing actuator being configured to move said collection tube from the receiving housing to the rear portion of said needle and vice versa, - an electromechanical device (21, 22) for disarming the head and emergency removal of said needle from said patient's limb configured to allow, on command, an exclusively mechanical removal of said needle from said patient's limb. - a frame equipped with means for removably fixing the frame to said mechatronic assembly, - a needle holder carried by said frame and adapted to receive a needle comprising a beveled portion intended to pierce the skin of the patient's limb to be punctured and a rear portion intended to allow the flow of collected blood to a collection tube, - linear displacement means of said needle holder configured to allow, once the latter is equipped with a needle, to arm the puncture head with a view to inserting, on command from said mechatronic assembly, this needle in said limb of said patient in order to be able to take a blood sample, - a device for fluidically connecting said rear portion of said needle mounted on said needle holder with a collection tube intended to collect the blood taken from said patient's limb, said fluidically connecting device being motorized and further comprising a device for loading and distributing blood collection tubes comprising at least one housing for receiving a collection tube and at least one securing actuator of this collection tube to the rear of a needle mounted on said needle holder, said securing actuator being configured to move said collection tube from the receiving housing to the rear portion of said needle and vice versa, - an electromechanical device (21, 22) for disarming the head and emergency removal of said needle from said patient's limb configured to allow, on command, an exclusively mechanical removal of said needle from said patient's limb.