Communication Unit

A communication unit prevents a malfunction which initiates communication against a user's will when communication for the purpose of remote dialog, without requiring a complex operation on the part of the user. This communication unit, used when a sender transmits his or her image or speech information to a recipient, comprises: a device that acquires image and speech information; a home server that transmits communication data indicating the information acquired by the information acquisition device to a device possessed by the recipient; and a detection unit that detects an object to be detected which is generated or changed by an action of the sender. The detection unit detects mutually different types of the objects each to be detected. Then, the home server starts transmitting the communication data when each detection result from each of two or more types of the detection units satisfies a predetermined condition.