An electric gun comprising: a housing ; an engine portion which is disposed in the housing and is for firing a bullet; an empty shooting prevention device ; and a bullet detection device , wherein the engine portion includes: a trigger ; a first contact ; a motor ; and a piston , wherein the empty shooting prevention device includes: a switch which is disposed in series with the first contact , wherein the first contact is configured to allow a current to pass when the trigger is pulled, in order to supply power to the motor ; and a power supply stop portion which is configured to disconnect the switch to prevent a power supply to the motor in response to an operation of the bullet detection device which detects that there is no bullet (G), wherein the power supply stop portion includes a detection receiving portion which is configured to receive the operation of the bullet detection device which is configured to detect that there is no bullet (G), a piston interlocking portion which is interlocked with a movement of the piston driven by the motor , and a switch disconnecting portion which is disconnected by the piston interlocking portion driven by the movement of the piston , wherein through the detection receiving portion engaging with the piston interlocking portion , the piston interlocking portion operates the switch disconnecting portion , and the switch disconnecting portion disconnects the switch , wherein the electric gun is characterized in that both the switch and the power supply stop portion are provided outside the housing . a housing ; an engine portion which is disposed in the housing and is for firing a bullet; an empty shooting prevention device ; and a bullet detection device , wherein the engine portion includes: a trigger ; a first contact ; a motor ; and a piston , a trigger ; a first contact ; a motor ; and a piston , wherein the empty shooting prevention device includes: a switch which is disposed in series with the first contact , wherein the first contact is configured to allow a current to pass when the trigger is pulled, in order to supply power to the motor ; and a power supply stop portion which is configured to disconnect the switch to prevent a power supply to the motor in response to an operation of the bullet detection device which detects that there is no bullet (G), a switch which is disposed in series with the first contact , wherein the first contact is configured to allow a current to pass when the trigger is pulled, in order to supply power to the motor ; and a power supply stop portion which is configured to disconnect the switch to prevent a power supply to the motor in response to an operation of the bullet detection device which detects that there is no bullet (G), wherein the power supply stop portion includes a detection receiving portion which is configured to receive the operation of the bullet detection device which is configured to detect that there is no bullet (G), a piston interlocking portion which is interlocked with a movement of the piston driven by the motor , and a switch disconnecting portion which is disconnected by the piston interlocking portion driven by the movement of the piston , a detection receiving portion which is configured to receive the operation of the bullet detection device which is configured to detect that there is no bullet (G), a piston interlocking portion which is interlocked with a movement of the piston driven by the motor , and a switch disconnecting portion which is disconnected by the piston interlocking portion driven by the movement of the piston , wherein through the detection receiving portion engaging with the piston interlocking portion , the piston interlocking portion operates the switch disconnecting portion , and the switch disconnecting portion disconnects the switch , wherein the electric gun is characterized in that both the switch and the power supply stop portion are provided outside the housing . <EOS>