The results of our analysis of the optical spectra of gamma Cas type stars under the large observation program Line Profile Variability in the Spectra of OBA Stars and the Nature of their X-Ray emission and the results of a study of the archival X-ray spectra of these stars based on the XMM-Newton satellite observations are presented. A fast variability of the line profiles in the optical spectra of gamma Cas type stars on scales from several minutes to hours, as well as a similar fast variability of their X-ray light curves are detected.