This study aimed to identify the extension of the effectiveness of a program based psychodrama in providing social competency skills for mentally handicapped children. The research consisted of (32) mentally handicapped children, whose ages range from (8 - 12) years of children from schools of rehabilitation of intellectual education boys and girls in the states of Kuwait, distributed on two groups, one experimental and the other control, by (16) children in each group. The research tools consisted of a measure of social competence and a program to develop social competence, and the semi-experimental approach was used, and the results showed that there were statistically significant differences between the average performance of the total Experimental and the control group in the post-application of the measure of social competence in favor of the experimental group. The results also showed the presence of statistically significant differences between the pre and post application of the experimental group in the social competence in favor of the post application, and the absence of statistically significant differences between the post-application and the successive social competence of the members of the experimental group.