This chapter provides detail description of Pneumonia in children. Chapter has 5 well illustrated diagrams and pictures. Pneumonia, etiology and etiological agents, indications for admission to hospital, response to treatment, non-response to treatment sign and symptoms, predisposing factors, pathogenesis, investigations, treatment, complications, treatment of complications and prevention are described in detail. One table is added to highlight etiology of pneumonia in children. 26 references are included at the end of the chapter to facilitate further reading.