Patient anxiety about the dental procedures is one of the most common problems in this profession. Most people avoid going to a dentist because of their fear and anxiety. The aim of this study was to examine the effects of communication skills training concerning satisfaction and anxiety level of dental students and their patients. The Ethics Committee of Mashhad University of Medical Sciences in Iran (no 86379) approved this study. In this controlled experimental clinical study, fifty-one last year dental students of Mashhad University and one hundred fifty-three patients were participated. Through use of an Anxiety standard questionnaire and school average of scores, data were collected about the level of satisfaction and anxiety and scientific and practical skills. Students of the experimental group took part in the communication skills workshop. The questionnaires were collected and because of ethic principles, participants were identified with numeric codes. Data were analyzed with t-test and Pearson correlation coefficient. There was a significant difference between satisfaction of interventional and control group. The communication skills workshop increased satisfaction of dental students (p=0/024). There was a negative correlation between anxiety and satisfaction (p-value=0.030, r=0.305). There was no significant difference between patients' satisfaction, patients' anxiety students' anxiety in the experimental and control group. Communication skills workshop increased the satisfaction of students but there was no effect on patients' satisfaction. There was a significant negative correlation between anxiety and satisfaction in both dental students and their patients. Communication skills increased the students' satisfaction, had an indirect effect on their anxiety level, and decreased it. Communication skills workshop is useful for dental students and their patient and would have good effects on doctor-patient correlation.