The goal of this article is to identify the variables of beliefs model in health of mothers who started the basic vaccination of their chidren. According to this model people to follow the preventive measures need to know: 1) person is susceptible to disease; 2) disease is serious; 3) there are many advantages and few or no barriers to action; and 4) a motivation must be present to guide the action. After collecting data and analysis, the results show that they are compatible to the used model