The surgical treatment of eight patients who had spontaneous subarachnoid hemorrhage from ruptured anterior communicating aneurysms is reported. The pre-operatory treatment is described, with emphasis to the patients condition before surgery. The surgical technique is described with special reference to the use of binocular microscope. Two patients (25%) had multiple aneurysms which were treated at the same operation. Meningitis was a complication on one patient but subsided with antibiotic treatment. After the operation 88% of the patients returned to their primitive jobs and there was no death related to the surgical treatment. Comments on other procedures for the surgical treatment of anterior communicating aneurysms are made.