BackgroundAround a quarter of Cambodian women reported being victim to intimate partner violence (IPV) from their current partner. Children’s exposure to familial IPV impacts psychosocial well-being and emerging research indicates associations with physical health.ObjectiveInvestigate associations between maternal experience of IPV and common childhood illnesses in Cambodia.Design, setting, participantsAnalysis of the Cambodia Demographic and Health Survey (2000, 2005, 2014) using logistic regression, including 5025 children under 5 years of age whose mothers responded to questions about experience of emotional, physical and sexual violence by current partner.Main outcome measuresReport of diarrhoea, acute respiratory infection (ARI) or fever, respectively, in children in the two weeks preceding the survey.ResultsChildren of mothers with experience of any type of IPV had estimated elevated odds of diarrhoea (adjusted OR (aOR)=1.65, 95% CI 1.39 to 1.97), estimated odds of ARI (aOR=1.78, 95% CI 1.47 to 2.16) and estimated odds of fever (aOR=1.51, 95% CI 1.31 to 1.76) compared with children of mothers without reported IPV experience. Exposure to any form of IPV corresponded to an estimated 2.65 times higher odds (95% CI 2.01 to 3.51) for reporting having both diarrhoea and ARI.ConclusionsOur findings support the notion that children’s susceptibility to diarrhoea, ARI and fever may be affected by mothers’ experience of IPV, including emotional violence. Maternal and child health programmes should train healthcare professionals to identify domestic violence and children at risk, and link victims to appropriate health and legal services.