There are various types of congenital anomalies and deformities of the ribs, including the developmental fusion of two or more ribs, the articulation or bridge formation between two ribs, bifid rib (forked rib) and hypoplastic/aplasic rib. These morphologic anomalies and anatomic variants occur in 0.15%–0.31% of the population. Here in this paper, three patients with rib hypoplasia were reported as examples of these rare asymptomatic anomalies. The chest X-rays of three soldiers presenting with several other complaints revealed rib hypoplasias. None of the patients had a congenital disease, and they had no complaints related to these rib hypoplasias. As it is known, these rare rib anomalies are usually of little or no clinical significance; however, any physician dealing with the lung and the chest wall should be familiar with these rare anomalies to distinguish them from any tumoral or inflammatory rib diseases, and the chest X-rays should be examined very carefully to detect such asymptomatic rib anomalies.