Introduction: Several difficulties of students with attention deficit/ hyperactivity disorder (ADHD) are related to executive dysfunctions, which may improve by neurofeedback training. This study was aimed to investigate the effect of neurofeedback training on sustain attention and working memory in male elementary school students with ADHD. Materials and Methods: This study was a quasi-experimental investigation with a pretest-posttest design. The statistical population were included male elementary school students with ADHA that referred to counseling centers of Varamin city in 2015. Thirty students were selected using sampling method and randomly divided into two groups. The experimental group educated twelve 60-minute-sessions of neurofeedback training. To assess sustain attention and working memory, CPT and N-back computerized tests were performed, respectively. Results: There was a significant difference between the averages of sustains attention and working memory of experimental and control groups in the posttest stage. The neurofeedback training significantly increased sustain attention and working memory in male elementary school students with ADHD. Conclusion: The findings suggest use of neurofeedback training to improve cognitive dysfunction in children with ADHD.