Purpose. To evaluate the utility of abdominal ultrasonography carried out using hand-carried devices in the emergency room. Materials and Methods. We reviewed records of abdominal ultrasonography using either of two different types of hand-carried devices by the first author in nontraumatic patients who presented to the emergency department. We chose 144 consecutive patients whose lesions had not been previously identified but were evaluated using imaging modalities other than plain radiography, endoscopy, or surgery after the ultrasonographic examination had been carried out. We retrospectively evaluated the accuracy of identifying abdominal lesions with the hand-carried devices. Results. The ultrasonographic findings of 116 (81%) cases agreed with the final diagnoses on the parts in which primary or main lesions were located; those of 28 (19%) cases did not. Twenty-five of the 28 examinations failed to detect the lesions, but 4 of the 25 examinations correctly detected significant indirect findings that contributed to the final diagnoses. Only 3 of the 28 examinations yielded incorrect results. Conclusion. Abdominal ultrasonography performed with the hand-carried devices after noting the patient′s history and carrying out a physical examination in the emergency room is useful in identifying the sites of primary or main lesions.