The phenomenon of financialization is multifaceted and can be considered from different points of view. The main purpose of the article is to show how financialization affects the erosion of the common good. To achieve this, various negative sides of financialization are described, referring to the eight principles of the common good: effective use of limited resources, freedom, prosperity, justice, responsibility, solidarity, primacy of interpersonal relations and institutional principle. Further considerations concern the presentation of possible solutions to the problem of financialization. Two perspectives are selected. First, the answer of Catholic social teaching to the phenomenon of financialization, as presented in the form of the Vatican document