To facilitate carrying and extraction of a phone and to avoid a theft or missing by providing a control chip capable of writing/reading an accounting information and speech information or the like and an antenna communicating with a signal with respect to a public phone into a pen type package.

A telephone pen A is equipped with a writing member 2 enhancing a writing function of a pen inside a pen type package body 1 carried in a pocket or the like of a suit, and has a control chip 3 that is capable of writing/reading the accounting information and speech information or the like and an antenna 4 that makes signal communication with a public phone B and receives power from the public phone B. This control chip 3 is configured as an integral package such as an IC (semiconductor integrated circuit) chip and an LSI (large scale semiconductor integrated circuit) chip and is provided with a CPU, a ROM and a RAM. Furthermore, a coil such a hand-wound coil and a coil with 10-turns or below made of printing can be adopted for the antenna 4.