Abstract: Disclosed is a self-defense gas spray device. The self-defense gas spray device sprays gas to a target so as to achieve self-defense goals. The self-defense gas spray device includes a flashlight member that flashes light to the target to which the gas is to be sprayed, while concentrating the light onto the target; and a gas spray member which evaporates a spray gas source contained therein into the gas and sprays the gas to the target while the light is being concentrated onto the target by the flashlight member. The disclosed self-defense gas spray device has advantages of spraying gas accurately onto a specific part of the target, for example, onto the face of the target, while blinding the eyes of the target in dark environment, such as at night.