An axial gap type rotating machine comprising: a rotating shaft ; one or more rotors that are arranged along the axial direction of the rotating shaft and rotatable integrally with the rotating shaft , each rotor comprising a rotary table and permanent magnets disposed on at least one surface of the rotary table ; a stator comprising a coil holding member that comprises thermoplastic resins containing inorganic mineral particles, coils secured to the coil holding member , and a radiation fin at a circumference of the coil holding member , wherein the stator is without an iron core inserted in the coils and the stator is disposed to be separated from the rotating shaft and to be spaced apart from the rotor so that a main surface of the stator is opposed to a main surface of the rotor on which the magnets are placed; one or more cooling fans ; and a housing secured to an outer part of the radiation fin to thereby accommodate the stator and said at least one or more rotors , wherein the radiation fin comprises aluminum, gold, silver, copper, or alloys thereof, and has a thermal conductivity of not less than 150 W/mK; characterised by: the coil holding member having a thermal conductivity of not less than 5W/mK and having an electrical conductivity of not more than 1 x 10 5 S/m, a respective cooling fan being disposed at a circumference of each rotor for blowing air to the radiation fin ; and the radiation fin having a concave-convex surface so that the surface area of the radiation fin is more than three times as large as an area of the main surface of the coil holding member , wherein the radiation fin and the at least one cooling fan are accommodated in the housing . a rotating shaft ; one or more rotors that are arranged along the axial direction of the rotating shaft and rotatable integrally with the rotating shaft , each rotor comprising a rotary table and permanent magnets disposed on at least one surface of the rotary table ; a stator comprising a coil holding member that comprises thermoplastic resins containing inorganic mineral particles, coils secured to the coil holding member , and a radiation fin at a circumference of the coil holding member , wherein the stator is without an iron core inserted in the coils and the stator is disposed to be separated from the rotating shaft and to be spaced apart from the rotor so that a main surface of the stator is opposed to a main surface of the rotor on which the magnets are placed; one or more cooling fans ; and a housing secured to an outer part of the radiation fin to thereby accommodate the stator and said at least one or more rotors , wherein the radiation fin comprises aluminum, gold, silver, copper, or alloys thereof, and has a thermal conductivity of not less than 150 W/mK; the coil holding member having a thermal conductivity of not less than 5W/mK and having an electrical conductivity of not more than 1 x 10 5 S/m, a respective cooling fan being disposed at a circumference of each rotor for blowing air to the radiation fin ; and the radiation fin having a concave-convex surface so that the surface area of the radiation fin is more than three times as large as an area of the main surface of the coil holding member , wherein the radiation fin and the at least one cooling fan are accommodated in the housing . <EOS>