To easily collect an inoperative force body, and to make a projecting distance constant.

In this force body projecting device 30 for projecting a force body 38 toward a prescribed defense region, a part of the force body projecting device 30 and the force body 38 are connected by a rope 45 of a specific length, and the force of the force body is exerted when the rope 45 is extended to the specific length accompanied by the projection of the force body 38.