The apparatus (2) for early diagnosis of carpal tunnel syndrome, of the type comprising: receiving means which define a receiving zone (8) for receiving a patient's finger, means for measuring the cutaneous sensibility of a finger (10) disposed in said receiving means, comprising a device for determining a sensation threshold of the finger pulp and a device for measuring the innervation density of the finger pulp, each device comprising protruding portions (22) adapted to be brought into contact with the finger (10), is characterized in that the protruding portions (22) of the device for measuring the innervation density are identical with those of the device for determining the sensation threshold.