In this paper, I explore the pricing of information goods related to the twosided markets. In value controversy on information goods, no one even hastried to think the two sided markets. By my exploring, I propose newinterpretation of the pricing unit of information goods. This is the platform. Tospeak precisely, this is the right to use platform. The result of this study isthat the profit rate of the platform in two sided market is higher than that ofthe firm in one sided market. For that reason, the additional problem remainsto be explained. I hope that the additional problem is solved by following-upstudy.