The telephone apparatus, particularly for use in a motor vehicle, has a hand-held receiver apparatus (3) (Handy) and an insert part (1) for receiving the same. The insert part (1) has preferably at least one function key (31a-c) as well as particularly at least one display element (33a-c). The function key or keys (31a-c) is or are arranged and structured in such a manner that they can be found and operated without eye contact. The insert part (1) and the hand-held receiver apparatus (3) have particularly coupling parts (24a, 24b) of a coupling (23) for the signal transmission that can be separated from each other or can grip into each other. At least one of the coupling parts (24a), particularly the one within the insert part (1), has a protective arrangement against the penetration of liquids and/or foreign bodies when the hand-held receiver apparatus is decoupled. The telephone apparatus (3) is structured in such a way that, when it is separated from the insert part (1) as well as when it is coupled with the same, not only simple communications technical functions can be carried out, but also further services and reports can also be performed partially automatically and/or by means of operators without problems in a function secure manner, particularly in a "rough" environment.