The BeppoSAX observation of Mrk 766

The Narrow Line Seyfert 1 galaxy Mrk 766 has been observed by BeppoSAX on M ay 1997. The source was fairly variable, both in flux and spectrum, during the observation. The variability is the largest around 2 keV, possibly due to variations in the warm absorber properties. An oxygen line is clearly de tected, at least in the first part of the observation. An edge around simil ar to7.5 keV, coupled with the lack of any detectable iron line, suggests e ither reprocessing of the primary X-rays by a mildly ionized disc or absorp tion by a further, thicker and more ionized material.