The invention relates to an exoskeleton (1) formed by longitudinal series of segments (3, 5, 7, 9) hingedly connected to one another at the ends thereof by means of respective intermediate pieces (11a, 11b, 11c) in turn hingedly connected to respective raised mountings (S) attached by the bases (20) thereof to various predetermined points of each finger. The free end of the first (3) of the segments (3, 5, 7, 9) is attached to a mobile part (40) of the user. In addition, part of the segments (5, 7, 9) include a projecting push portion (E1, E2, E3) for pushing the respective finger at different points when the aforementioned mobile part (40) is moved, triggering the simultaneous movement of the segments (3, 5, 7, 9), such that the hand is directed towards a more closed position, in which the fingers retract towards the thumb, or vice-versa.

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