As a consequence of the deregulation of the American airline industry in the 70 s, Yield Management was created as a managerial tool in order to maximize the profits and to keep the competitive advantages of companies of the sector. With time, this tool was adopted by other service companies, where a flexible demand for a fixed capacity and high under utilization costs exist, helping the managers to maximize their operations revenues. Yield Management (YM), or Revenue Management, is the allocation process of the right type of capacity to each type of customer at the proper price to maximize the sales revenues of services, or of highly perishable goods. It can still be said that YM is a systematic form to carry out a type of discriminatory price to meet demand taking into account occupation data and the marginal cost of resource utilization (airplane, hotel, or another service rendering system). The study presented in this thesis aimed at verifying how the main tourist hotels of Rio de Janeiro are taking advantages of this tool within their reservation and sales processes. To accomplish this objective, a sample of eleven hotels was selected amongst the fifteen more important hotels of the main touristic area of Rio de Janeiro City. Interviews were carried out with the managers responsible for the reservation and, or sales, departament, who answered a questionnaire about the current application of YM elements within the organization. The results have indicated that YM is still very little spread out among these hotels, being recognized and of incipient application, only in large hotel chains, mainly, the international ones. Some obstacles pointed out by the respondents and inferred from their responses are commented.