This survey was the evaluation of the program on Polio Eradication through Acute Flaccid Paralysis (AFP) Surveillance especially Hospital Based Surveillance. The evaluation was done by reviewing the Hospitals' Record (Hospital Based Survey). The objective of the survey was to estimate the under reported of routine reporting system, which the data of the survey used as a gold standard. The results showed that due to incomplete of the records in several hospitals, some of AFP cases might be could not be covered. However the under reported of the routine surveillance system was more than 50%. It seems that the strengthening of supervision was still needed to increase coverage of the routine surveillance system.