A case of a male patient repeatedly hospitalized for paranoid-catatonic type schizophrenia is presented. During many relapses of the schizophrenic disorder he manifested symptoms "imitating" psychotic (catatonic) symptoms. However, their occurrence was closely related to the current situation in the patient's environment, and they completely disappeared as soon as his situation changed. Diagnostic and therapeutic difficulties resulting from concurrence of conversion-type and dissociative symptoms resembling psychotic symptoms are discussed. The author deals also with the problems of the relationship between schizophrenic psychosis picture and inappropriate defence mechanisms of personality.