Pneumonia is a common disease in pediatrics mainly in infancy and early child hood. Mechanical ventilation is one of the major supportive modalities of treatment in the intensive care unit but it carries a lot of risks and complications. The research aims to assess the impact of educational Program upon nurse's knowledge and practice regarding children with pneumonia under mechanical ventilation at Ahmad Gasim to prevent Complication. Respiratory infections account to majority of acute illnesses in children, cause and course of these infections are influenced by age of child, season, living condition and pre-existing medical problem.