A method and an apparatus for ergonomic evaluation of the postures of the wrist (2) of an operator during a work cycle provide for the provision of sensor means (3, 4) for detecting the oscillation angle of the wrist both in the radio-ulnar oscillations plane and in the flexion-extension oscillations plane, and processing means (6) for monitoring, during the operation, the point for identifying the posture of the wrist (2) in a diagram bearing - on two cartesian axes - the values of the radio-ulnar oscillation angles and the values of the flexion-extension oscillation angles. The processing means (6) are adapted to send - to display means (7) - information regarding the percentage of the time for performing the work cycle in which the wrist (2) is located respectively in the following three parts of the diagram: the part of the diagram outside a first closed area (A), corresponding to unacceptable postures, the part of the diagram within a second closed area (B) which is in turn within said first closed area (A), said second closed area (B) corresponding to widely acceptable postures, and lastly the part of the diagram comprised between the perimeters of said first closed area (A) and said second closed area (B), corresponding to postures with intermediate level of acceptability.
