Abstract: Objective: To investigate the risk factors for cerebral infarction (CI) resulting from transient ischemic attack (TIA). Methods: The clinical data of 110 hospitalized patients with TIA were evaluated. Results: Thirty-eight patients (34.5%) suffered from cerebral infarction (CI) following TIA in 110 patients. Eight patients with CI resulted from vertebra-basilar artery system, and 28 resulted from internal carotid artery system. There was significantly different in two artery systems (P>0.05). The risks of cerebral infarction were significantly increased in the patients whose syndromes lasted for over 30 min, the patients with 5 attacks within 24 h, the patients who were treated beyond 24 h of syndrome onset, or the treated patients with 5 attacks or more (P<0.05-P<0.005). The high blood pressure, hyperglycaemia and hyperlipoidemia often happened in the patients with CI (P<0.05-P<0.01). Conclusions: The risk is high for the patients to develop CI if patients with TIA last for long time or frequency of attack is much more, or therapy is not yet in time, especially for the patients with high blood pressure, hyperglycaemia and hyperlipoidemia.