To provide an information processing device that facilitates an audience to transmit information thereto. This information processing device is configured to include a memory part having an audience area and to be connected with first (presenter side) and second (audience side) terminals. The audience area records a various kinds of information including a presentation material of plural page numbers. The device operates to (1) read out only a character string added with a page number selected by the second terminal from the memory part and causes the second terminal to output the resulting string, (2) record additionally an information combination on an audience writing area which is formed of a character string entered from the second terminal, the selected page number, and a terminal ID, and (3) cause the first terminal to read out the information combination added with the selected page number and to output the resulting information combination.