An electric power tool comprising: a brushless motor covered with a resin motor case , the brushless motor having a rotor , an output shaft fixed to the rotor and supported by bearings, and a cylindrical stator wound with coils and covered with the motor case, the brushless motor driving a tip tool (T); and a motor housing made of aluminum alloy, the motor housing at least partly covering the motor case , the motor housing being exposed to outside air, characterized in that : the electric power tool further comprises: a fan provided to a tip of the output shaft , an outer periphery of the fan being covered with a cylindrical fan case; and a control board having a control circuit for controlling the rotation of the motor , the control board being housed in a pedestal board and, disposed adjacent to the motor housing and fixed axially along an outer peripheral surface of the motor housing , wherein a heat dissipation space through which cooling air passes is formed between the control board and the motor housing , a bottom cover is attached to the housing, the motor case is interposed between the motor housing and the motor , the bottom cover is formed with air holes and the motor housing has an air hole that is formed on opposite side of the fan so that the brushless motor is disposed between the air hole and the fan in the axial direction of the rotor , and cooling air generated by the fan passes through the air hole , the fan is configured to generate cooling air that passes through a gap between the stator and the rotor after passing through the air hole , and flows along an exterior of the motor housing through the air hole . a brushless motor covered with a resin motor case , the brushless motor having a rotor , an output shaft fixed to the rotor and supported by bearings, and a cylindrical stator wound with coils and covered with the motor case, the brushless motor driving a tip tool (T); and a motor housing made of aluminum alloy, the motor housing at least partly covering the motor case , the motor housing being exposed to outside air, a fan provided to a tip of the output shaft , an outer periphery of the fan being covered with a cylindrical fan case; and a control board having a control circuit for controlling the rotation of the motor , the control board being housed in a pedestal board and, disposed adjacent to the motor housing and fixed axially along an outer peripheral surface of the motor housing , wherein a heat dissipation space through which cooling air passes is formed between the control board and the motor housing , a bottom cover is attached to the housing, the motor case is interposed between the motor housing and the motor , the bottom cover is formed with air holes and the motor housing has an air hole that is formed on opposite side of the fan so that the brushless motor is disposed between the air hole and the fan in the axial direction of the rotor , and cooling air generated by the fan passes through the air hole , the fan is configured to generate cooling air that passes through a gap between the stator and the rotor after passing through the air hole , and flows along an exterior of the motor housing through the air hole . <EOS>