This current study aimed to explore the mediation effects of mother's mental health symptoms between marital adjustment and child development aspects. (666) participants of mothers and their children were the sample of the study. The researchers used the marital adjustment scale prepared by Manson, Morse, Lerner, Arthur, as well as, a package of tests for some aspects of growth Kindergarten children prepared by Kenawi and Mohamed (1999). In addition, theyemployed a list of modified symptoms (Symptom Checklist-90- Revised (SCL) -90-, prepared by Derogatis, Lipman and Lipogun & Cov (1976), The results of the current study showed there is a statistically significant relationship between marital adjustment and the symptoms of mental disorder in mothers; there is a statistically significant relationship between marital adjustment and Kindergarteners development. The study also found there is no mediating role for the mothers’ mental health symptoms between marital adjustment and aspects of development in kindergarten children except of the emotion development. Moreover, there are no statistically significant differences at the level of significance (a≤0.05) in marital adjustment due to the following variables (the educational level of the mother, the work of the wife, citizenship, the educational level of the father, the relationship of kinship with the husband. Finally, there are statistically significant differences at the level of significance (a≤0.05) in the development of Kindergarteners due to the variable of kinship relationship with the husband, and the absence of statistically significant differences at the level of significance (a≤0.05) in the development of Kindergarteners due to the variable

(breastfeeding, type of birth and health status).