A portable automated external defibrillator includes a body and an accessory. The body includes a sub power source, a main controller, and a cable winding unit inside the body, an operation button on a front surface of the body, a main electrode pad on a rear surface of the body, and a plug on a side of the body and to which a cable wound on the cable winding unit is coupled. The accessory includes a main power source and a sub-controller inside the accessory, a sub-electrode pad on a rear surface of the accessory, and an outlet on a side of the accessory. The portable automated external defibrillator may prevent a cable of the electrode pad from being twisted or broken, and stably perform an electric shock by the main power source kept in an inactive state during carrying and which is activated in use.
