Knowledge on the reproductive system, significance of benefiting from the contraceptive methods and selection of the suitable contraceptive method during the first years of the marital life are of the main health issues. This study was conducted in order to determine the effect of the counseling on the reproduction and sexual health of the married couples. This pre and post partial experimental study was done on 40 couple participating at the pre marriage counseling classes selected by the improbable simple method. The data collection tool was questionnaire designed by the family planning office of the Ministry of Health and Medical Education of Iran and its validity and durability were confirmed. It comprised two individual and questions of knowledge assay sections filled before and after counseling by showing film and giving lecture. The collected data were analyzed by SPSS-11.5 software using the descriptive statistics and index of distribution and paired t-test. The study subjects, mean score of awareness at pre and post counseling increased to 2.4, which was statistically significant (P<0.0001). The obtained data of the present study showed that counseling and instruction improve the level of awareness among the participants. Therefore, it is concluded that, it is possible to increase the level of knowledge and awareness on the married life among the marriage candidates, which is very helpful in their long lasting married life by applying the correct method of instruction and proper counseling.