Most traumatic kidney injuries are due to closed trauma caused by traffic or sports accidents. The validation of the ASST classification (American Society of the Surgery of Trauma) has led to a better analysis and management of those lesions. The occurrence of acute renal ischemia following trauma is a rare entity and is often associated with multi-organ dysfunction. There is no real recommendation for the management of this entity because of their low incidence, the delay in diagnosis and partly because of the diversity of the actors of the therapeutic decision. Our observation illustrates the safety of a conservative attitude in the management of a post-traumatic left renal ischemia, and through which we will resume the pathophysiological, diagnostic and therapeutic aspects.