Today, with the observation of periods of fluctuation in financial and investment markets, there is a strong need for acquiring financial knowledge among the members of society. Real shareholders are sometimes inexperienced and uneducated people who suffer more from market fluctuations than corporate shareholders. This shows the need for further studies among real Muslim shareholders in Tehran stock market and securities. Therefore, the present study has examined the impact of financial knowledge, financial confidence, and learning capacity on the financial behavior of Muslim shareholders in Tehran Stock Exchange. The research method used is applied and descriptive, survey. The statistical population of the study includes all Muslim shareholders in the Tehran Stock Exchange and the exact number of whom was unknown to the researcher. The sample size was determined to be at least 200 people using a rule of thumb and according to the questionnaire questions, which ultimately resulted in 270 usable questionnaires with the researcher's follow-up. A non-random sampling method is available, and data from the participants was collected through questionnaires with confirmed validity and reliability. 270 complete questionnaires were received and used as the basis for analysis. The collected data was analyzed using SmartPLS software. The results indicate that financial knowledge has a significant effect on the financial behavior of Muslim shareholders. In addition, financial confidence has a positive effect on the financial behavior of these shareholders. Also, learning capacity has a significant effect on the financial behavior of Muslim shareholders.