A device for quantifying the dexterity of the fingers of a hand, comprising: - a main body , the dimensions of the main body allowing a user to take the device in the palm of the hand, - several assemblies for measuring the movement and/or the force applied by a finger along a supporting direction , each measuring assembly comprising a deformation sensor , the deformation sensor comprising a deformable body , each measuring assembly also comprising: • a guide bearing , secured to the main body, • an axis having a supporting surface , the supporting surface being in contact with the deformable body , • a tube , adapted to slide in translation in the guide bearing and about the axis along the supporting direction , having a head adapted to fix the finger to the tube, • a first spring connecting the bearing to the tube , • a second spring connecting the axis to the tube , the first spring and the second spring being pre-stressed so as to pre-stress the deformable body and keep the tube at equilibrium in the absence of pressure of the finger on the head , the first spring and the second spring each being in compression at equilibrium of the measuring system , this arrangement of the device making it possible to carry out: - finger flexion force measurements, by movement of the finger towards the deformable body along the supporting direction , - finger extension force measurements, by movement of the finger away from the deformable body along the supporting direction . - a main body , the dimensions of the main body allowing a user to take the device in the palm of the hand, - several assemblies for measuring the movement and/or the force applied by a finger along a supporting direction , each measuring assembly comprising a deformation sensor , the deformation sensor comprising a deformable body , • a guide bearing , secured to the main body, • an axis having a supporting surface , the supporting surface being in contact with the deformable body , • a tube , adapted to slide in translation in the guide bearing and about the axis along the supporting direction , having a head adapted to fix the finger to the tube, • a first spring connecting the bearing to the tube , • a second spring connecting the axis to the tube , the first spring and the second spring being pre-stressed so as to pre-stress the deformable body and keep the tube at equilibrium in the absence of pressure of the finger on the head , the first spring and the second spring each being in compression at equilibrium of the measuring system , this arrangement of the device making it possible to carry out: the first spring and the second spring being pre-stressed so as to pre-stress the deformable body and keep the tube at equilibrium in the absence of pressure of the finger on the head , the first spring and the second spring each being in compression at equilibrium of the measuring system , this arrangement of the device making it possible to carry out: - finger flexion force measurements, by movement of the finger towards the deformable body along the supporting direction , - finger extension force measurements, by movement of the finger away from the deformable body along the supporting direction . <EOS>