Pharmacological treatment of adult with attention deficit with hyperactive disorder (ADHD) has been shown to be successful; however, medication may not normalize executive functions. The present study was assessed the effect of working memory training program on executive functions of adult with ADHD. Sixteen adults with ADHD and 16 healthy adult participated in the study. After a diagnostic and baseline evaluation, 16 adults with ADHD participate in up to 16 sessions of working memory training program and the outcomes are evaluated. Healthy people did not receive any training. Working memory and attention, were examined prior to and following the interventions. Data analysis revealed that the working memory training used in the present study led to significant improvements of various aspects of attention, including focus and sustain attention and capacity of working memory. The findings indicate that working memory training programs can improve working memory performance and have the potential to facilitate attentional functioning in adult with ADHD as well.