The traumatic rupture of an accessory spleen is a very rare condition and only few cases have been reported in the literature. We describe the case of a 51-year-old man undergone splenectomy for trauma several years before, who developed hemoperitoneum due to a laceration of a voluminous accessory spleen, following an accidental two-meter fall. As a conservative management of the injury was not possible, an accessory splenectomy was then required. Thus, a briefly review of the literature about this uncommon topic was perfomed.