An information providing device assisting the users who meet each other accidentally in forming a community includes a user database (306) managing user information, an information database (307, 309, 310) managing information to be provided to a user, a database management unit (301) for managing information stored in the user database (306) and the information database (307, 309, 310), an information-receiver deciding unit (302) deciding a user who receives information stored in the information database (307, 309, 310) from the user information registered in the user database (306) in accordance with a prescribed condition and providing the user with an access right to information, and an access control unit (303) receiving access from the user and dynamically constructing a page to be displayed for the access based on the information database (307, 309, 310).