An intestinal tube of one balloon and double lumen is deviced which is 120cm long and 16 F, in width and 8 patients were examined with double contrast small bowel series with the following results: 1. There are 7 males and one female patients, and their age range is from 3 to 61 years old. 2. An amount of 240-300cc. of 50w/v% Barium is intaken per os and intubation is done per nose. An intubation time is 5 minutes or less 7 patients and 10 minutes in one patient, and side effects of intubation and air insufflation into small bowel via this tube are in the order of abdominal distension, nausea and nasal pain etc. 3. The maxinal internal diameter of hypotonic small bowel is measured as following: 1) jejunum: 36mm. 2) mid small bowel: 39mm. 3) ileum: 36mm. 4. The barium intaken was transited caudally with air insufflation, and insufflation would be begun when caudal barium column reaches distal ileum, for better delineation of double contrast small bowel. 5. An ileoceal valve reg ons were delineate best in the study and mid small bowell bowel, jejunum, and ileum in the order of list. And jejunum is delineated nicely with spot supine AP, LAO and erect views, mid small bowel in spot supine RAO, AP and erect AP views and routine abdomen in RAO, AP and LAO views, and ileum in spot supine RAO, AP and routine abdomen AP views.