Background. Childhood diarrhea remains a major public health problem in sub-Saharan Africa (SSA). Women empowerment reduces child mortality, and wife beating attitude is one of the indicators of women empowerment. There is a dearth of evidence about wife beating attitudes and childhood diarrhea in SSA. Therefore, the present study aimed to examine the association between attitude towards wife beating and diarrhea among under-five children. Methods. We used Demographic and Health Surveys from 25 countries in SSA that were conducted between 2010 and 2020. Using Stata version 14 software, we carried out the analysis on 153,864 children under five. Bivariate and multivariate logistic regression analyses were applied, and the results were presented using adjusted odd ratios (aOR) at 95% confidence interval (CI). Results. The pooled results show that 71.4% of married women disagreed with wife beating. About 20.5% of under-five children of married women had diarrhea. Childhood diarrhea varied from highest prevalence in Chad (27.9%) to the lowest prevalence in Sierra-Leone (8.5%). The study showed lower odds of diarrhea among children of married women who disagreed with wife beating (aOR = 0.66 95% CI; 0.54-0.80) compared to children of married women who agreed with wife beating. Moreover, the study results show that women's age (35-39 years-aOR = 0.48, 95% CI; 0.31-0.74, 40-44 years-aOR = 0.57, 95% CI; 0.35-0.93, 45-49 years-aOR = 0.35, 95% CI; 0.16-0.79) was negatively associated with childhood diarrhea, while husband's education (primary school-aOR = 1.36, 95% CI; 1.05-1.77), parity (ever born 3-4 children-aOR = 1.36, 95% CI; 1.09-1.70, and 5+ children-aOR = 1.56, 95% CI; 1.14-2.12), and religion (Muslim-aOR = 3.56, 95% CI; 1.44-8.83) were positively associated with diarrhea among under-five children. Conclusions. The study shows association between women attitude towards wife beating and childhood diarrhea. Therefore, empowering women, especially young women by increasing awareness about domestic violence, their rights, and empowering them through education and economic advancement need to be considered in order to reduce childhood diarrhea. Moreover, fertility control or birth spacing and working closely with religious leaders are important factors to consider in reducing childhood diarrhea.