Opportunity of enjoying video and music is enlarged. A content reproducing device is used in a contents exchange system including a plurality of contents reproducing devices. The content reproducing device includes a short range communication unit, a memory, a control unit, and a speaker. The short range communication unit communicates request information, response information, content data and flag information to/from content reproducing devices. The control unit controls the short range communication unit so that content data is transmitted. The control unit controls the memory such that the content data and the flag information received by the short range communication unit are stored.