Penetrating trauma to the thoraco-abdominal region is a difficult clinical problem, in particular or the detection of diaphragmatic injuries. While patients with hemodynamic instability or peritonitis undergo laparotomy, clinically stable patients with equivocal peritoneal signs pose a challenge in management. This repor summarizes our preliminary experience with therapeutic laparoscopy in the assesment of four patients presenting penetrating wounds in lower chest abdomen, with isolated diaphragmatic injuries. The patients were stable on admission, with normal thoracic X-rays. The diaphragmatic injuries were repaired by laparoscopic endosuture and all the patients presented a satisfactory recovery