With the aim of analyzing the information search behavior of investors working in the stock market, this research sought to raise the aspects related to this behavior with focus on the cognitive and causal aspects which pervaded the need for information of these investors. For that, the general pattern of informational behavior proposed by Wilson [1] and the analysis of a report from an investor of the stock market area were used as the basis for the analysis and reflection. The report of only one investor was used as the basis for investigation, turning it impossible to extrapolate such result to a greater universe. The objective of this research was to investigate the need for information, the context and the intervenient variables which might interfere or not in the information search behavior of investors, in an attempt to get a deeper comprehension about the subject, as well as to propose the continuity of studies with basis on this study proposal.