This study was conducted to find out the medical exposure dose in simple abdomen A-P projection of adults, based on the 87 hospitals located in Seoul. As the results, the following conclusions have been reached; 1. 88.5 % of the surveyed hospitals had the use of $65;kVp{sim}79;kVp(M{pm}SD:71.45{pm}4.73;kVp)$ as tube voltage. 2. 87.35 % of the surveyed hospitals had the use of $50;mAs{sim}89;mAs(M{pm}SD:64.31{pm}16.21;mAs)$ as the amount of current. 3. Shallow doses ranged from 2.00 mSv to 4.99 mSv($M{pm}SD:3.81{pm}1.01;mSv$) in 80.46 % of the surveyed hospitals. 4. Exposure dose was directly depended on the tube voltage or the amount of currents.