A restriction control device controls restriction on communication of a user device in a mobile communication system, and is provided with: an information acquisition unit which acquires, from a user information management device in the mobile communication system, group identification information indicating a group to which the user device belongs; and a restriction determination unit which, when receiving a communication request from the user device, on the basis of the group identification information and a group identification information relating to an object to be controlled designated by an operation system, determines whether or not the group to which the user device belongs is the object to be controlled.