A device for delivering a medical fluid comprising a body which houses: - at least one containment tank of a medical fluid, - a fluid injection device which interfaces with said containment tank and is suitable to allow controlled delivery of a fluid through a cannula , - an extraction device of the cannula from a retracted or rest configuration to an extracted or infusion configuration, - activation means rotatable about a rotation axis (X-X) in an injection rotation direction (I) and in a control rotation direction (C), opposite each other, wherein the activation means comprise a control member configured so that the extraction of the cannula takes place by rotating the activation means in the injection rotation direction (I) or in the control rotation direction (C), wherein the control member is operatively connected to a rotor wherein the control member is operatively connected to said fluid injection device and to said extraction device of the cannula , - wherein each of said injection and extraction devices is operatively connected to the control member by a one-way transmission mechanism (56, 56',56"), which allows the transmission of motion in one of said rotation directions (C, I) of the control shaft and prevents it in the other direction of rotation (I, C), said one-way transmission mechanisms (56,56',56") being opposite each other so that the rotation of the control shaft in the control rotation direction (C) allows the verification of the status of the extraction device of the cannula and the rotation of the control shaft in the of injection rotation direction(I) allows the activation of the fluid injection device . - at least one containment tank of a medical fluid, - a fluid injection device which interfaces with said containment tank and is suitable to allow controlled delivery of a fluid through a cannula , - an extraction device of the cannula from a retracted or rest configuration to an extracted or infusion configuration, - activation means rotatable about a rotation axis (X-X) in an injection rotation direction (I) and in a control rotation direction (C), opposite each other, wherein the activation means comprise a control member configured so that the extraction of the cannula takes place by rotating the activation means in the injection rotation direction (I) or in the control rotation direction (C), wherein the control member is operatively connected to a rotor wherein the control member is operatively connected to said fluid injection device and to said extraction device of the cannula , - wherein each of said injection and extraction devices is operatively connected to the control member by a one-way transmission mechanism (56, 56',56"), which allows the transmission of motion in one of said rotation directions (C, I) of the control shaft and prevents it in the other direction of rotation (I, C), said one-way transmission mechanisms (56,56',56") being opposite each other so that the rotation of the control shaft in the control rotation direction (C) allows the verification of the status of the extraction device of the cannula and the rotation of the control shaft in the of injection rotation direction(I) allows the activation of the fluid injection device . <EOS>