A transmission system includes a transmission management system including: a first receiving unit that receives user identification information from transmission terminals; a user identification information management unit that stores user identification information in association with transmission terminal identification information of transmission terminals serving as transmission sources of the user identification information in the first storage unit; a first extracting unit that refers to, when the first receiving unit receives request for presentation from a certain transmission terminal, the first storage unit and extracts transmission terminal identification information of transmission terminals in transmission and user identification information associated with the transmission terminal identification information; and a second transmitting unit that transmits the extracted transmission terminal identification information and the extracted user identification information in association with each other to the transmission terminal serving as the transmission source of the request for presentation.