In a material of 665 aspiration curettages of the uterus we investigated the advantages and problems as well as the clinical reliability of this method. In 15% of all cases the procedure could not be proceeded by technical reason or by insufficient material for histological diagnosis. On the other hand diagnostic accuracy in endometrial cancer is as reliable as in conventional curettage in general anaesthesia. The curettage can easily be performed with minimal costs as an out-patient procedure. This is the main advantage of aspiration curettage.