Cuba is living a quick aging and the increment of surgical interventions in the elderly is an irrefutable reality. Acute peritonitis constitutes a serious intrabdominal infection, with high morbidity and mortality, even more if the patient is advanced in years. Taking into account the above-mentioned the present investigation was carried out aimed at designing the nursing specialized cares to the elderly with acute peritonitis that require an abdominal emergency operation due to this cause. This cares will be completed during the preoperative, peroperative and postoperative periods. The topics we have showed guarantee the assistance quality of this population group and the nursing staff necessary training.