A continuous glucose measurement apparatus, comprising: - a body attachable unit configured to be insertedly attachable to a body for periodically measuring blood glucose; and - an applicator in which the body attachable unit is coupled, the applicator configured to outwardly discharge the body attachable unit according to manipulation of a user so that the body attachable unit is insertedly attached to the body, - wherein the body attachable unit comprises: - a housing configured to be outwardly discharged by the applicator, - a sensor unit installed to the housing, wherein one end portion of the sensor unit outwardly protrudes from the housing to be inserted into the body according to outwardly discharging movement of the housing, and - a needle unit covering the one end portion of the sensor unit and configured to be separably coupled to the housing to be inserted into the body together with the sensor unit according to the outwardly discharging movement of the housing, and - wherein the applicator comprises a needle extracting unit configured to extract and remove the needle unit from the body by moving the needle unit in a direction opposite to an outwardly discharging direction after the needle unit is partially inserted to the body before insertion of the sensor unit into a skin of the body is completed so that the needle unit is less deeply inserted into the skin than the sensor unit and pain occurring during insertion is reduced, - wherein the sensor unit outwardly protrudes from the housing so that the sensor unit is insertable into subcutaneous tissue of the skin in a state that the housing is outwardly discharged and the body attachable unit is attached to skin of the body, - the needle unit is formed to have a protrusion length which is equal to or greater than a length of the sensor unit that is outwardly protruded in a state that the needle unit is coupled to the housing so that the needle unit is inserted into the skin first and then guides the insertion of the sensor unit. - a body attachable unit configured to be insertedly attachable to a body for periodically measuring blood glucose; and - an applicator in which the body attachable unit is coupled, the applicator configured to outwardly discharge the body attachable unit according to manipulation of a user so that the body attachable unit is insertedly attached to the body, - wherein the body attachable unit comprises: - a housing configured to be outwardly discharged by the applicator, - a sensor unit installed to the housing, wherein one end portion of the sensor unit outwardly protrudes from the housing to be inserted into the body according to outwardly discharging movement of the housing, and - a needle unit covering the one end portion of the sensor unit and configured to be separably coupled to the housing to be inserted into the body together with the sensor unit according to the outwardly discharging movement of the housing, and - wherein the applicator comprises a needle extracting unit configured to extract and remove the needle unit from the body by moving the needle unit in a direction opposite to an outwardly discharging direction after the needle unit is partially inserted to the body before insertion of the sensor unit into a skin of the body is completed so that the needle unit is less deeply inserted into the skin than the sensor unit and pain occurring during insertion is reduced, - wherein the sensor unit outwardly protrudes from the housing so that the sensor unit is insertable into subcutaneous tissue of the skin in a state that the housing is outwardly discharged and the body attachable unit is attached to skin of the body, - the needle unit is formed to have a protrusion length which is equal to or greater than a length of the sensor unit that is outwardly protruded in a state that the needle unit is coupled to the housing so that the needle unit is inserted into the skin first and then guides the insertion of the sensor unit. - a housing configured to be outwardly discharged by the applicator, - a sensor unit installed to the housing, wherein one end portion of the sensor unit outwardly protrudes from the housing to be inserted into the body according to outwardly discharging movement of the housing, and - a needle unit covering the one end portion of the sensor unit and configured to be separably coupled to the housing to be inserted into the body together with the sensor unit according to the outwardly discharging movement of the housing, and - wherein the applicator comprises a needle extracting unit configured to extract and remove the needle unit from the body by moving the needle unit in a direction opposite to an outwardly discharging direction after the needle unit is partially inserted to the body before insertion of the sensor unit into a skin of the body is completed so that the needle unit is less deeply inserted into the skin than the sensor unit and pain occurring during insertion is reduced, - wherein the sensor unit outwardly protrudes from the housing so that the sensor unit is insertable into subcutaneous tissue of the skin in a state that the housing is outwardly discharged and the body attachable unit is attached to skin of the body, - the needle unit is formed to have a protrusion length which is equal to or greater than a length of the sensor unit that is outwardly protruded in a state that the needle unit is coupled to the housing so that the needle unit is inserted into the skin first and then guides the insertion of the sensor unit.