This descriptive study used admission level data of 1040 patients to find out the readmission rate and its possible contributing factors within 30 days of discharge in a selected Armed Forces Hospital (Combined Military Hospital, Dhaka). The patients were grouped according to their admission status like group-I (readmission within 30 days of previous discharge), group-II (readmission after 30 days of previous discharge) and group-III (newly admitted patients). The readmission rate at the study period was 9.5% in group-I and 10.2% in group-II. The overall readmission rate was 19.7%.