An applicator for a continuous blood glucose measurement device, comprising: a main case having an inner space and an open side, wherein a pressure button is installed at one side of the main case to be manipulated by a user; a shooting plate movably coupled to the inside of the main case, the shooting plate being configured to be movable according to a pressurizing operation of the pressure button, a plunger elastic spring, a plunger body fixed at a first location inside the main case by being interlocked with the shooting plate, the plunger body being configured to be released from the interlock with the shooting plate according to the movement of the shooting plate and to be linearly movable to a second location in an outward discharge direction by the elastic force of the plunger elastic spring, wherein interlock of the shooting plate and the plunger body is released upon a pressurizing operation of the pressure button to allow the plunger body move in the discharge direction by the elastic force of the plunger elastic spring (S 1); a body attachable unit coupled to the plunger body so as to be movable from the first location to the second location together with the plunger body to be insertedly attached to a human body; and a protection cap separably coupled to the open side of the main case to prevent exposing the body attachable unit to an outside of the main case in a state that the body attachable unit is positioned inside the main case, the protection cap being configured to limit movement of the shooting plate in a state that the protection cap is coupled to the main case to prevent pressurizing operation of the pressure button, wherein a protruding step unit is formed at one side of the shooting plate, and a locking protrusion unit is formed at the protection cap, the locking protrusion unit being configured to be interlockedly coupled to the protruding step unit in the state that the protection cap is coupled to the main case, or be released from interlock with the protruding step unit in the state that the protection cap is separated from the main case. a main case having an inner space and an open side, wherein a pressure button is installed at one side of the main case to be manipulated by a user; a shooting plate movably coupled to the inside of the main case, the shooting plate being configured to be movable according to a pressurizing operation of the pressure button, a plunger elastic spring, a plunger body fixed at a first location inside the main case by being interlocked with the shooting plate, the plunger body being configured to be released from the interlock with the shooting plate according to the movement of the shooting plate and to be linearly movable to a second location in an outward discharge direction by the elastic force of the plunger elastic spring, wherein interlock of the shooting plate and the plunger body is released upon a pressurizing operation of the pressure button to allow the plunger body move in the discharge direction by the elastic force of the plunger elastic spring (S 1); a body attachable unit coupled to the plunger body so as to be movable from the first location to the second location together with the plunger body to be insertedly attached to a human body; and a protection cap separably coupled to the open side of the main case to prevent exposing the body attachable unit to an outside of the main case in a state that the body attachable unit is positioned inside the main case, the protection cap being configured to limit movement of the shooting plate in a state that the protection cap is coupled to the main case to prevent pressurizing operation of the pressure button, wherein a protruding step unit is formed at one side of the shooting plate, and a locking protrusion unit is formed at the protection cap, the locking protrusion unit being configured to be interlockedly coupled to the protruding step unit in the state that the protection cap is coupled to the main case, or be released from interlock with the protruding step unit in the state that the protection cap is separated from the main case.