Pneumonia still causes around two million deaths among children annually (20% of all child deaths). Any intervention that would affect pneumonia mortality is of great public health importance. This meta-analysis provides estimates of mortality impact of the case-management approach proposed by WHO. We were able to get data from nine of ten eligible community-based studies that assessed the effects of pneumonia case-management intervention on mortality; seven studies had a concurrent control group. Standardised forms were completed by individual investigators to provide information on study description, quality scoring, follow-up, and outcome (mortality) data with three age groups (<1 month, < 1 year, 0·4 years) and two mortality categories (total and pneumonia-specific). Meta-analysis found a reduction in total mortality of 27% (95% Cl 18–35%), 20% (11–28%), and 24% (14–33%) among neonates, infants, and children 0·4 years of age, respectively. In the same three groups pneumonia mortality was reduced by 42% (22–57%), 36% (20–48%), and 36% (20–49%). There was no evidence of publication bias and results were unaltered by exclusion of any study. A limitation of the included studies is that they were not randomised and, because of the nature of the intervention, could not be blinded. Community-based interventions to identify and treat pneumonia have a substantial effect on neonatal, infant, and child mortality and should be incorporated into primary health care.