Chronic Subdural Hematoma (CSDH) is the problem of infancy and elderly. There are many technique for operation of CSDH, but recurrent bleeding, pneumocephalous and cerebral swelling are the main complication of these techniques. A simple and easy technique is used with intermittent irrigation and unilateral drainage system, which can prevent the two main problems of CSDH operation, cerebral swelling and pneumocephalous. We have operated 17 patients with CSDH between 21 March 2003 till 20 March 2004 with our technique. 76.5% of the patients were male and 23.5% patients were female. The range of the age was between 2 year till 90 year. The main reasons for admission were Hemiplegia (35.2%), Dementia (35.2%), Headache (47%) and symptoms mimicking CVA (20.4%). After operation there was not pneumocephalous or a very small bleb of air at post operation CT-scan. We did not have any complication except two recurrent CSDH, in one of them at the contra lateral side and in one case at the same side who still had continued the consumption of Aspirin after operation. These two cases have been also operated successfully with the same technique.