Decision making problems have occurred in a variety of different fields including personal decisions as well as industries or even countries. As there are various decision makers such as person, group, company, and so on, the criteria for the decision are numerous. Although there is only one criterion, in most cases decisions are made with multiple criteria, which is called multiple criteria decision making. Various criteria affect to make decisions in the multiple criteria decision making problems. On the other hand, since those criteria have different units, it is difficult to compare the criteria with different units so that they represent the impacts for the criteria. To resolve the difficulties, there is an excellent multiple criteria decision making method, so called TOPSIS(technique for order of preference by similarity to ideal solution). TOPSIS provides a solution for decision making problems with multiple criteria using matrix theory. This paper deals with distribution channel selection problem using TOPSIS. Distribution channel as a path from manufacturer to end customers has played an important role in supply chain management and marketing in that customers' needs have increased, technologies has advanced, and the complexity of suppy chain has been higher than before. In this paper, we suggest how TOPSIS applies to the problem of distribution channel selection and investigate the insights of the approach.