The amount of pneumonia case toward children under five years old tends to increase in Surabaya city every years. It is one of the big ten disease attacked to children in ganesa room Bhakti Dharma Husada hospital during 2011–2013. The purpose of this research to analyze the risk factors of those children based on measles imune status and breast freeding exclusive status. This kind of research is analytical observational within case control designed. The sample of this research consist of 20 case sample (the injuries children of pneumonia) and was taken from totally population and 40 control sample (not injuries children of pneumonia) was derived from random sampling. The independent variable are measles imune status and breast freeding exclusive status, even though the dependent variable is pneumonia disease at children under five years old. The data analysis by calculating odds ratio and using statcalc in the level 95% confidence interval. The result of this research showed that the most injuries children of pneumonia are male of 1–<2 years old. Those the children who didn't get measles imune can be attacked pneumonia disease for 10,23 higher than children get measles imune; 95% CI (1,60–107,95) and the last the children who didn't get breast freeding exclusive can be attacked pneumonia disease for 7,00 higher than children that get breast freeding exclusive; 95% (1,82–29,49). The importance of raising the awareness of parents regarding measles immunization and exclusive breastfeeding can prevent occurrence pneumunia in infants..