Tourism represents all the relationships that can result from the movement and the holidays of peoples that spend time outside their residence, people who are not motivated by a permanent establishment or a gainful activity. From this brief definition, it can be said that the tourism industry is one of the most important industries of a country or a region and it is an industry which generates capital, jobs and creates the image of a country / region. Noteworthy is that the tourism industry is constantly evolving and with the acceleration of technical progress, the tourism industry is also growing. This evolution cause the appearance of new types of tourism, which gradually turns into tourism market niches. This article aims to identify and describe the two major forms of tourism, and to emphasize the importance of each of them on the tourism market in Romania. The structure of the article comprise: a brief introduction, the relation between mass tourism and niche tourism, tourism niche in the literature, niche tourism types and conclusions related to niche tourism development in Romania.