To provide an emergency reporting system by a portable telephone set capable of reporting an emergency even in a case that the portable telephone set is outside a portable telephone set usable area and in a case that it is in a communication difficult state.

For this system, a button 3 for emergency report is equipped in this portable telephone set, an emergency report monitoring device 4 for receiving the emergency report from the portable telephone set and communicating with a required part is equipped on the base station side and a reception dedicated antenna 5 for the emergency report used for the emergency report in an area incapable of using the portable telephone set is equipped. Thus, this emergency reporting system by the portable telephone set capable of reporting the emergency even when the portable telephone set is in the area incapable of using the portable telephone set or in the communication difficult state where a telephone line is busy or the like is obtained.