Objectives This study aimed to build a scale of transparency, partnership, validity and reliability and factor structure it. Methods The research method was descriptive in nature. The sample consisted of 345 patients (170 males and 175 females) in Tehran who were selected using stratified sampling. Transparency scale was used for the marital relationship. The internal validity of the method for determining the correlation of each question with a total score category was used. The exploratory factor analysis was conducted on 116 items of scale. Finally, the procedures for internal consistency (Cronbach's alpha and test-retest) and validity were used. Results The primary factor analysis, 10 factors with eigenvalues greater than 1 were next and factor analysis were limited to ten. Based on the content of the article, the ten factors were "emotions", "finance income", "employment issues", "relationships outside the home", "boundary", "family home", "marriage", "leisure", "relationship with family and friends" and "children". The scale had good internal consistency (Cronbach's alpha and test-retest reliability within ten days of 0.87, 0.86). Conclusion The results showed that the scale transparent relationship of the structure is satisfactorily reliable and valid in the Iranian society. It can be said that the self-report scale tool is useful for research purposes. This tool can help determine the transparency of the relationships, the possibility of secrecy or predict the likelihood of marital infidelity.