There is provided an added information distribution apparatus including a receiving section that receives added information which are added to a shared electronic document; added information memory that stores information on the added information; a message management section that, when the receiving section receives added information, identifies pieces of added information which should be transmitted as a message from among the received added information or the stored added information in accordance with preset conditions for transmission, and compiles one or more pieces of identified added information together to compose a message; and a message transmission processing section that transmits the composed messages to members who share the electronic document.