The present invention provides a mobile telephone capable of establishing connection to the Internet or the like only by operating a side key with a simplified connecting operation and reduced time required for connection. A portable telephone as a mobile telephone includes an Internet connecting function, a telephone function, other various functions, a side key provided for a side face of the body to execute a specific function, a display provided for an operation face, and a memory storing information including telephone numbers and URLs. When the side key is depressed long, a controller displays the URLs read from the memory in a list format onto the display and establishes connection to one URL selected from the list by the side key.