Understanding market means developing their own business, including marketing strategy, and other business advertising, which seeks to attract as many customers or consumer. In order to be successful in their own business manufacturer must understand the needs of their consumer. It is necessary to know whether a product targeted to the younger or the older population, those with more income or those whom have less money. Consumer behavior varies depending on the market of final consumption or market business spending, and therefore there are ultimate consumer and business customer. It is important to know that consumer must go through five stages to decide on the purchase, and this phase are: knowledge of the problem, information search, evaluation of altematives, purchase decision and behavior after purchase. In this thesis analyzed the process of making purchasing decision. The paper consist of two parts: the first part contains the definition and division, describes the influence of certain factors to decide on the purchase or displays the subject of research, and a second part empirical analyzes data obtained by questionnaire. Interpret the attitudes and opinions of respondents about the impact of the decision on the purchase. Finally, according to the conclusion, list of literature that was used, and a list of charts and pictures, as well as the attached questionnaire.