Background & Aim: Health Promotion and Prevention of disease are two important aims of health programs. Despite many efforts which have been done for health promotion, sexually transmitted diseases is yet one of the societies health problem today. The educational and teaching efforts, can confined these infections which seems health educational models, such as health belief model has a key role in this matter.

Methods & Materials: This study was a semi - experimental survey conducted in case - control method. Sampling size included 30 couples in each group that was selected randomly. The couples in the experimental group were educated based on health belief model, during two 30 minutes educational sessions and the couples in the control group participated in the routine counseling classes. The data of this research was gathered by a questionnaire in two stages before and 4 month after education, then was analyzed by SPSS software.

Results: The results of this study indicated that there was no significant differences between two groups in demographic characteristics and agent of health belief model (perceived susceptibility, severity, benefits and barriers of STDs). Comparing of those two groups indicated that after education, there were significant differences between perceived susceptibility (p<0.0001), severity (p<0.0001), benefits (p<0.0001), barriers (p<0.002) and practice (p<0.009).

Conclusion: Findings of this study showed that education through health belief model was effective in preventing STDs. Then this educational model can be applied in educating adolescents and other people for preventing STDs.