Objective: To evaluate sonographic confirmation of nasogastric tube placement. Materials and methods: (1) A nasogastric tube in water was examined by ultrasonography. (2) A nasogastric tube in a healthy volunteer was examined by ultrasonography. (3) Nasogastric tube placement was examined by ultrasonography in 10 patients who had a nasogastric tube inserted to treat their diseases and for whom the placement had already been confirmed by radiography. Results: (1) The nasogastric tube was visualized as two to four hyperechoic parallel lines in longitudinal view. (2) The nasogastric tube was visualized both at the cervical esophagus and the abdominal esophagus. Nasogastric tube placement was confirmed. (3) Of 10 patients, the nasogastric tube was visualized at the cervical esophagus in eight patients and at the abdominal esophagus in four patients. Conclusion: Nasogastric tube placement can be confirmed by ultrasonography.