Provided is new means for reducing risk of cerebral hemorrhage associated with a reperfusion therapy for vessel occlusion (for example, administration of a medicament including a thrombolytic agent, a platelet aggregation inhibitor, and an anticoagulant agent, or physical removal of a blood clot) and treating an ischemic vascular disorder more effectively. The present invention relates to a medicament for treating an ischemic vascular disorder, comprising mesenchymal stem cells, wherein the medicament is used in combination with a reperfusion therapy for vessel occlusion and more specifically, to a medicament for treating an ischemic vascular disorder, wherein the medicament reduces risk of cerebral hemorrhage associated with the reperfusion therapy for vessel occlusion and extends a time window in which the therapy is applicable.
