To provide a liquid injection device for crime prevention 1 the liquid for which can be stirred easily and a liquid injection device for the crime prevention 2 the liquid for which is stirred automatically for preventing the separation of paint or the like from a solvent, capable of surely applying the crime prevention liquid to a burglar.

In the liquid injection devices for the crime prevention 1, 2, the crime prevention liquid stored in a tank 11 is sprayed through a nozzle 20 with a pump 12. Further, a flexible pipe is used as an inlet pipe 16, or the tank 11 and the inlet pipe 16 are connected by easy coupling 31 so that a clerk can lift and shake the tank 11 easily. In another way, a stirring device 4 is mounted to the tank 11, or a pendulum device 3 is mounted to the liquid injection device for the crime prevention 2. The liquid injection devices 1, 2 are placed near the entrance or counter of a store.