Hysteroscopy is a diagnostic or surgical mini-Invasive gynecologic operating procedure. The complications of this standard procedure are relatively rare. According to retrospective studies they are 0.95-13.6%. They occur more often by an operative rather than a diagnostic hysteroscopy. These complications could be divided into two groups of an approximately equal occurrence--due to a dilation and passing through the cervix uteri (cervical laceration, creative a false cervix uteri, perforation, bleeding, impossibility to pass through the inner orifice of the cervical canal, insufficiency of the cervix uteri) and due to the operative technique itself (uterine perforation, fluid overload, thermal or mechanical trauma of the inner urinaiy and gastrointestinal tract, infection, rupture of the uterus during a subsequent pregnancy). The most occurring complication is namely the uterine perforation--1-9%, the most severe could indeed be the fluid overload--0.01-11%. The gynecologist performing the hysteroscopy should be well grounded in the typical complications. Unveiling and performing a quick intervention of the latter could prevent unwanted consequences for the patient and the legal issues that could follow occur.