Osteopetrosis is a rare disorder characterized by abnormal resorption and remodelling of bones owing to the defective osteoclastic activity. In some cases it may be asymptomatic and diagnosed accidentally. Here, we present such a case of osteopetrosis where we suspected the disease from the chest roentgenogram of the patient. Then the typical osteosclerotic changes in the skeletal survey of the patient confirmed our diagnosis of osteopetrosis.