Emphysematous pyelonephritis (EPN) is an acute necrotizing infection with evidence of gas inside the kidney, perinephric space, and/or urinary collecting system. This condition is usually encountered in an obstructed urinary system of diabetics or immunocompromised patients and carries poor prognosis. The gold standard for early diagnosis is computed tomography (CT) of the abdomen. Percutaneous/surgical drainage and urgent or delayed nephrectomy are the available treatment options. We report one case of EPN, which was diagnosed in an immunocompetent non-diabetic man with a non-obstructed urinary system.