A positioning information transmitting device for transmitting the current site data to a peripheral device(s) using wireless signals. The current side data, as the positioning information of the current site, calculated by a portable telephone signal positioning processor 20 or a GPS unit 30, is transmitted to a CPU 12 through an interfacing (I/F) unit 11. The positioning information transmitting device 10 includes a local wireless communication unit 40 for transmitting/receiving data to or from the peripheral device(s). The current side data is transmitted from a CPU 12 through a communication controller 13 so as to be processed by a baseband processor 41 of the local wireless communication unit 40. The so processed data is superposed by an RF processor 41 on a carrier wave so as to be transmitted over a wireless path to a peripheral device(s) from a local wireless communication antenna 43.