Fractures of the skull base are said to occur in 4% with head trauma and account for 21% of all skull fractures. Basal skull fractures and the diagnostic value of head computed tomography are of particular interest, and there have been numerous reports on these fractures and their CT findings, but not on MRI. We present a case of basal skull fracture with multiple cranial nerve palsy, and especially the facial nerve swelling revealed on axial MRI, and another case with left internal carotid artery occlusion and left cerebellar infarction detected by magnetic resonance imaging(MRI) and MR angiography, treated with anticoagulation. Initial neurological and neuroradiological investigations should be aimed at promptly detecting cranial nerve injuries and their correlating fracture at the skull base. But confirmative diagnosis of the complications of basal skull fracture such as multiple cranial nerve injury and vascular injury using MRI is also necessary, to explain the clinical manifestation exactly and to give optimal management.