Delusions are thinking phenomena occurring in various mental disorders. Although for many decades now researchers have been seeking for a key to the mystery of delusions, no holistic explanation has been found so far. Thought content is known to be one of the criteria allowing to judge whether a given thinking process is delusional or not. It is to the content of delusions that this theoretical/empirical paper is devoted. Subjects in the study were 72 patients with paranoid schizophrenia. Their delusions during the schizophrenic episode under study were analyzed. The most frequent were delusions of control, of reference, and persecution, while delusions of thought exposure, of grandeur and depressive delusions were found somewhat less often. Interestingly, in the selected sample of patients with paranoid schizophrenia the latter two types of delusions, usually associated with mood disorders, were relatively frequent. Somatic delusions, as well as fantastic ones and delusions of personal change were only sporadic.