A conference information processing apparatus for wireless communication with information terminals, the conference information processing apparatus permitting the information terminals that participate in a conference to access information used at the conference, the conference information processing apparatus comprising: an authentication unit configured to authenticate the information terminals based on authentication information, the authentication information being transmitted from the information terminals; an information storage unit configured to store related information about the information terminals in a first memory unit, the related information being transmitted from the information terminals permitted to participate in the conference in response to successful authentication performed by the authentication unit; a transmission unit configured to transmit the related information about the information terminals stored in the first memory unit to the information terminals successfully authenticated by the authentication unit; and a communication restricting unit configured to restrict communication performed by a first one of the information terminals indicated by identification information, the identification information being included in the related information, in a case where the identification information indicative of the first one of the information terminals and a request for removal from the conference are received from a second one of the information terminals; characterised in that the communication restriction includes registering the identification information in a removal list database and discarding communication requests from the first one of the information terminals identified by the identification information. an authentication unit configured to authenticate the information terminals based on authentication information, the authentication information being transmitted from the information terminals; an information storage unit configured to store related information about the information terminals in a first memory unit, the related information being transmitted from the information terminals permitted to participate in the conference in response to successful authentication performed by the authentication unit; a transmission unit configured to transmit the related information about the information terminals stored in the first memory unit to the information terminals successfully authenticated by the authentication unit; and a communication restricting unit configured to restrict communication performed by a first one of the information terminals indicated by identification information, the identification information being included in the related information, in a case where the identification information indicative of the first one of the information terminals and a request for removal from the conference are received from a second one of the information terminals; characterised in that the communication restriction includes registering the identification information in a removal list database and discarding communication requests from the first one of the information terminals identified by the identification information.