A fastening apparatus having front and rear ends the fastening apparatus comprising a power transmission unit configured to transmit the rotation of an electric motor, having a first transmission system (15, 19, 23, 61, 62); a joint shaft that is arranged in front of the electric motor and is rotated by transmitting power by the first transmission system of the power transmission unit; Z wherein the fastening apparatus is for fastening a blind nut to a member to which it is to be mounted; the power transmission unit comprises a second transmission system (14, 15, 18, 19, 21, 63, 64); a spindle that is arranged in front of the electric motor and that is rotated by transmitting power by the second transmission system of the power transmission unit; a spin shaft that grips a shaft unit of a mandrel and rotates the mandrel with rotation of the joint shaft; a rotating clutch (61, 62) for transmitting the rotating force of the joint shaft to the spin shaft; and a stroke clutch (63, 64) that is disposed between a stroke mechanism (36, 44) that strokes the mandrel with the rotation of the spindle and the spindle, and that transmits the rotation of the spindle to the stroke mechanism; wherein the rotation clutch is provided with a rear clutch nut and a front clutch nut; the rear clutch nut transmits the rotational force of the joint shaft to the front clutch nut when engaged with the front clutch nut, but may be disengaged from the front clutch nut by a predetermined rotational load; the front clutch nut has a cylindrical shape, the spin shaft can be arranged at an axial centre unit, and is configured so that when it is engaged with an engagement unit of the spin shaft a rotational force is transmitted to the spin shaft, but is disengaged by a predetermined stroke toward the tip of the spin shaft; the stroke clutch is provided with a spindle clutch and a nut clutch; and the spindle clutch transmits the rotational force of the spindle to the stroke mechanism when engaged with the nut clutch, but is disengaged from the nut clutch by a predetermined stroke toward the rear end of the mandrel. the fastening apparatus comprising a power transmission unit configured to transmit the rotation of an electric motor, having a first transmission system (15, 19, 23, 61, 62); a joint shaft that is arranged in front of the electric motor and is rotated by transmitting power by the first transmission system of the power transmission unit; Z wherein the fastening apparatus is for fastening a blind nut to a member to which it is to be mounted; the power transmission unit comprises a second transmission system (14, 15, 18, 19, 21, 63, 64); a spindle that is arranged in front of the electric motor and that is rotated by transmitting power by the second transmission system of the power transmission unit; a spin shaft that grips a shaft unit of a mandrel and rotates the mandrel with rotation of the joint shaft; a rotating clutch (61, 62) for transmitting the rotating force of the joint shaft to the spin shaft; and a stroke clutch (63, 64) that is disposed between a stroke mechanism (36, 44) that strokes the mandrel with the rotation of the spindle and the spindle, and that transmits the rotation of the spindle to the stroke mechanism; wherein the rotation clutch is provided with a rear clutch nut and a front clutch nut; the rear clutch nut transmits the rotational force of the joint shaft to the front clutch nut when engaged with the front clutch nut, but may be disengaged from the front clutch nut by a predetermined rotational load; the front clutch nut has a cylindrical shape, the spin shaft can be arranged at an axial centre unit, and is configured so that when it is engaged with an engagement unit of the spin shaft a rotational force is transmitted to the spin shaft, but is disengaged by a predetermined stroke toward the tip of the spin shaft; the stroke clutch is provided with a spindle clutch and a nut clutch; and the spindle clutch transmits the rotational force of the spindle to the stroke mechanism when engaged with the nut clutch, but is disengaged from the nut clutch by a predetermined stroke toward the rear end of the mandrel.