To provide an electronic conference system by which three parties or more at remote places portiapates virtually in an electronic conference, without requiring a multi-point video conference controller.

Companies A, B, C introducing an electronic conference system in common utilizing an ISDN 1 for conducting an electronic conference. Conventional personal computers 10A, 10B, 10C are installed respectively to the companies, and the personal computers are provided respectively with electronic conference channels 11A, 11B, 11C and interrupt notice channels 12A, 12B, 12C. Each personal computer is provided with a software, including a function of making an interrupt notice to an opposite party, when the opposite party has already made an electronic conference, a function where a party receiving the interrupt notice automatically starts a conference to the opposite party making the interrupt notice after the end of the current conference, a function of recording an agenda of the electronic conference, and various functions attending with a basic function in addition to an electronic conference software commercially available on market.