This study aims to analyze the effects of communication skills training program provided to the mothers on the social skills of their children. The study uses pre- and post- tests control group design. Experiment and control groups consisted of a total of 30 six-year-old children who were enrolled in nursery school. Experiment group consisted of 15 children; control group consisted of 15 children. The mothers of the children in experiment group were provided communication skills training for 13 weeks. SSES (social skills evaluation scale) was administered to the children before and after the training. The results of pre- and post- tests were compared and the effects of mothers' training program on the social skills of the children were investigated. (Contains 5 tables.)