Introduction : Maternal morbidity is a public health problem in developing countries.Purpose of research : The aim of this study was to determine the prevalence of maternal morbidity among women of reproductive age in the province of Essaouira (Morocco) and to describe the factors associated with it. The authors conducted a cross-sectional structured interview survey of 1300 married women aged 18 to 49. Data entry and statistical processing were performed by the SPSS-PC 18 program.Results : The prevalence of maternal morbidity was 66.8%. The main morbidities were sexually transmitted infections (48.8%) and anemia (46.6%). Multivariate analysis showed that frequency of postnatal visits, literacy of the couple and socioeconomic level were statistically associated with maternal morbidity.Conclusion : The use of postnatal care, the fight against illiteracy and the improvement of the socio-economic level of households, are factors that would reduce maternal morbidity.