A 48 years old male was visited with complaining of painful swelling of the left knee joint for 2 weeks duration. On radiological finding of the patella, there was found local rarefaction and osteolytic change in the inferior pole. It was diagnosed as Salmonella osteomyelitis of the patella and was confirmed by bacteriological study. Osteomyelitis of the patella caused by Salmonella group C as an etiological factor has not been reported. It was treated by conservative method with satisfactory result.