Diarrhea is one of the mayor diseases that cause mortality in community, especially to child under five years in development country. In 2006, Sub Ministry of Health Cililin major to depression number of diarrhea from 7,33% until 5 % in 2007. So, diarrhea as a problem for our community especially to child under five year, that we know their immunity so fragile into diseases and diarrhea. This goal of research to take information about mother efforts that have child under five years for preventing diarrhea and doing early intervention to child with diarrhea in Cililin Village District of Cililin West Bandung Residence. The type of this research is descriptive quantitative. Populations in this research are mothers with child under five years in Cililin Village District of Cililin, West Bandung Residence. Samples are taken by incidental sampling and total sample are 91 mothers. Data are collected by instrument and then are analyzed with percentage and proportion formula. Result of this research show most of the respondents (87,9%) have good efforts for preventing diarrhea and doing early intervention to child with diarrhea. Based on sub variable of mothers efforts for preventing diarrhea are know that most of mothers(91,2%) have a good efforts. Based on variable doing early intervention to child with diarrhea are know that half of respondent (70,3%) have a good efforts. Based on this research, every one especially government must plan a good program to prevent diarrhea and doing early intervention, especially in West Bandung Residence, The other hand, the suggestion to health worker especially nurse can be do more health education.
Key word: Family efforts, preventing diarrhea and doing early intervention, child under five years.