Objective: To describe two cases of electroconvulsive therapy for hysterical catatonia. Case Descriptions Mrs A was 62 years old, was married for 42 years, and was in the postmenopausal period. She was being followed at a psychiatry outpatient clinic for 35 years, with a diagnosis of conversion disorder and somatization disorder. She has not been on medication for the last three months. Previously used drugs were duloxetine, venlafaxine, sulpride, olanzapine, and amisulpride. Ten days before admission, she had suddenly stopped talking and eating. There was a physical inactivity and decreased need for sleep. In history, her first complaints were weakness of muscles, pseudoseizure, and tremor. Symptoms of the disease were exacerbated Methods: A 62-years-old female patient with a diagnosis of conversion disorder and somatization disorder and a 20-years-old female patient with a diagnosis of conversion disorder were treated on electroconvulsive therapy. Electroconvulsive therapy was performed in 8 sessions with anaesthesia. Results: 62-years-old patient began to recover after the sixth session of electroconvulsive therapy once every two days. Complete remission in catatonic symptoms also sustained during follow-up. The catatonic symptoms of the 20-years-old patient were completely terminated after the second session of the ECT once every two days. The treatments were completed in 8 sessions. Conclusion: We suggested that electroconvulsive therapy may be an effective treatment technique for conversion disorder earlier than drug treatment. It is thought that hysterical catatonia or another term expressing this condition may be used in psychiatric classification systems such as DSM.