A technique controlling transmission and display of terminal information in accordance with a movement state and an operation state. A communication unit transmits terminal information including at least movement information of a communication apparatus to another communication apparatus, and receives other terminal information including at least movement information of the other communication apparatus from the other communication apparatus. A terminal information controller controls transmission of the terminal information from the communication unit to the other communication apparatus based on the movement state estimated by a movement-state estimation unit and the operation state managed by an operation-state management unit, and when it is determined on the basis of the terminal information and the other terminal information received by communication unit that an attention calling state has occurred, controls display information that causes a display to display attention calling information on the basis of the movement state and the operation state.