The coexistence of cerebral infarction and subarachnoid hemorrhage (SAH) in patient with reversible cerebral vasoconstriction syndrome (RCVS) is rarely reported. We report a patient with RCVS coexisting convexal SAH and watershed infarction. A-56-year old female complained recurrent thunderclap headache, which started 14 days ago. Her headache began during swimming and resolved within 20 mins. Next day, headache reemerged during swimming, and resolved within 30 mins. However, her headache persisted without relief since last 10 days. Noncontrast brain CT showed no evidence of hemorrhage. However, serial lumbar puncture showed pinkish color of cerebrospinal fluid (CSF) with elevated RBC upto 15520. Brain MRI depicted convexal SAH in left frontal lobe and multiple small watershed cerebral infarction in right hemisphere. Brain angiography showed multiple stenosis of bilateral intracranial vessels. She was diagnosed with reversible cerebral vasoconstriction syndrome complicating SAH and cerebral infarction. We started oral nimodipine and her headache resolved within 4 days. The cerebral angiogram performed at 3 months showed complete resolution of previous stenosis. We described a rare presentation of RCVS complicating SAH and cerebral infarction simultaneously. CSF study could be important diagnostic tool for the evaluation of thunderclap headache. Imaging study using MRI rather than CT could be helpful in these patients. Loss of control for maintaining vascular tone could be the most important cause of RCVS. In this patient, convexal SAH would be supposed to be the early manifestation of small arteriolar involvement and cerebral infarction as the later progression of larger artery vasoconstriction.