NOVELTY - The heater has an upper frame (61) that supports an upper radiation plate and a lower frame (62) that supports a lower radiation plate. The upper frame and lower frame are interconnected in a housing (40) that maintains the fixed state of radiation plate and a positive temperature coefficient resistor. The positive temperature coefficient resistor is fixed between pair of radiation plates. The positive temperature coefficient resistors are connected to an applied power source. The housing is formed in the edge of radiation plate.    USE - Positive temperature coefficient (PTC) heater for electric vehicle and fuel cell vehicle.    ADVANTAGE - The heat dissipation efficiency is improved. The temperature of air is increased effectively. The malfunction including overheat of the component which is caused by applying high voltage, damage and short circuit are prevented. The cohesive power of the radiation plate is improved and the radiation plate is fixed to be stabilized effectively. The conductivity of the radiation plate and positive temperature coefficient resistor and the heat transmission through conduction and convection are improved. The use stability and product reliability are secured through the positive temperature coefficient resistor, the radiation plate and modularization of the housing and the maintenance and repair are facilitated. The conducting efficiency is improved with the constant resistance degradation between the positive temperature coefficient resistor and the radiation plate and the efficiency for heat dissipation is improved with the thermal conductivity increase between the positive temperature coefficient resistor and the radiation plate. The damage of the positive temperature coefficient resistor is prevented. The damage of the radiation plate is prevented.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the PTC heater.    Housing (40)    Connection connector (50)    Mains connection (52)    Upper frame (61)    Lower frame (62)