A telephone equipment having a main apparatus and a plurality of cordless handsets, which can perform an extension communication with being relayed by the main apparatus. Such a telephone equipment includes a line holding system that holds a connection between the main apparatus and the outside apparatus, an extension communication detecting system that detects start of the extension communication when the communication with respect to the outside apparatus is being held, a timer that measures a time period elapsed from the start of the extension communication, and a notification system that causes at least one of the cordless handsets performing the extension communication to perform a notifying operation when the time period measured by the timer exceeds a predetermined time period.