Electroconvulsive therapy (ECT) is a psychiatric treatment used in variety of conditions including resistant and debilitating conversion disorders. Dandy Walker syndrome is a congenital brain malformation involving the cerebellum and the şuid filled spaces around it. This syndrome is the partial or even complete absence of the part of the brain located between the two cerebellar hemispheres (cerebellar vermis). Herein we describe the case of a 34-year-old male patient with a history of disabling motor symptoms. He also has got the diagnosis of Dandy Walker Syndrome. No pathology could be detected in the examination conducted on an organic cause of the patient with severe motor symptoms. The patient had been hospitalized for about 3 weeks. The patient did not respond to the pharmacological treatment and ECT treatment was started due to the increasing deterioration of the general condition. Patient’s symptoms improved dramatically after 10 sessions of ECT. Our aim is to figure out the effectiveness of ECT in treatment of resistant conversion disorder with motor symptoms.