This paper presents a novel system to track a moving human in living environment. The tracking technique is based on dead reckoning navigation in which the location of the traveler is estimated from measurements of moving distance and direction. The proposed system consists of a portable instrument of the pedestrian and a monitoring instrument in a base station. In the pedestrian portable instrument, the present position is detected at every step from the number of walking steps from the pedometer and the direction from the terrestrial magnetic sensor. In the base station, the map matching process is applied to the positional data transmitted by the portable telephone, and the walking trajectory is depicted on the display of a PC. From the experiments for tracking the walking of a healthy person in an urban area, a residential area, and a mountain path, it is confirmed that the proposed system can track the movement. Also, by transmitting the environmental sound around the pedestrian such as announcement of bus stops through a portable telephone, the possibility is shown for pedestrian tracking including movement by public transport.