Approximately 830 women die each day worldwide from pregnancy related complications, 99% of them in developing countries and more than 50% in sub-Saharan Africa. Despite increasing global and national attention on safe motherhood, a recent study by the relevant agencies and the World Bank identified Kenya as one of eight countries in Africa that have made very little progress in reducing maternal deaths. The study sought to assess the influence of belief systems on maternal health in Kilifi South sub-county. The objectives of the study included; to examine the existing Cultural beliefs that women hold during pregnancy in Kilifi South Sub County; to establish the factors contributing to the continued beliefs and practices regarding maternal health in Kilifi South Sub County and to examine the perceptions and attitudes of women on the beliefs held regarding maternal health in Kilifi South Sub county. This study was based on the Theory of Planned Behaviour one of a closely inter-related family of theories which adopt a cognitive approach to explaining behaviour as propounded by be able to perform or carry out the behaviour, and is very similar to notions of self-efficacy. The researcher used descriptive research design using both quantitative and qualitative approaches. The study targeted women of Kilifi County, health practitioners and opinion leaders. The sample population of the study was 397 women, these were sampled using disproportionate stratified sampling. Both questionnaires and interview schedule were used as data collection tools. Quantitative data was coded and analyzed using SPSS version 21. Descriptive statistics were used for quantitative data with frequency distribution tables developed and categorized using a non-normal scale while qualitative data was transcribed, coded and analyzed. Inferential statistics were further used to reach conclusions of the research. The study established that 73.3% of the women of reproductive age are aware of the traditional beliefs and practices that affect maternal health. These range from diet taboos that deny women the nutrients required by