A large part of people s goals and dreams involve financial resources. And for them to be achieved, financial education is crucial. For a long time, psychologists and sociologists opposed traditional finance theories, because they consider that investors, like any human being, are not fully rational beings. Faced with adverse results, studies began to focus on understanding the relationships between finances and psychological aspects. Therefore, the present work aims to analyze behavioral biases and possible influences exerted on investment decisions to be taken by people with some knowledge of the stock market. To achieve this objective, the following steps were carried out: preparation of a questionnaire to be answered by investor-subjects who have some knowledge of the stock market, in such a way that they can attribute degrees of importance to criteria, comparatively; analysis of the responses obtained, with the purpose of proposing an investment portfolio for each identified profile, based on the AHP method; identification of behavioral biases in the investment decisions of each investor-subject and comparative analysis of the results obtained; return to the subjects of the proposed portfolios and question whether they are in accordance with what was presented. As a result, it was observed that there is indeed an influence of these biases on decision-making, which corroborates the need for financial education that takes behavioral aspects into account.