A sensor inserting device for inserting a detector of a sensor which measures biological information of a person to be measured into a body of the person to be measured, the sensor inserting device comprising: a device body; and a movement mechanism which is provided in the device body and inserts the detector and the insertion needle into a body of the person to be measured by moving the sensor together with the insertion needle which is pierced into the body of the person to be measured, wherein a signal processor which processes a signal including biological information from the sensor is attached to the device body, and the signal processor is connected to the sensor and allowed to dwell on a skin of the person to be measured at a location of insertion in which the detector is inserted into the body of the person to be measured, wherein said sensor inserting device further comprises: a dwelling member which is arranged on a moving path of the sensor and attached to the sensor by a movement of the sensor caused by the movement mechanism, characterized in that the dwelling member includes an engaging unit which supports the sensor at the location of insertion, a base which supports a state in which the supported sensor is connected to the signal processor, and an adhesive portion which sticks the base on to the skin of the person to be measured, wherein on a distal end portion of the device body, the dwelling member is arranged, and a signal processor displacement mechanism which allows the signal processor to slide toward the base, after inserting the detector into the body of the person to be measured, so as to be supported by the dwelling member. a device body; and a movement mechanism which is provided in the device body and inserts the detector and the insertion needle into a body of the person to be measured by moving the sensor together with the insertion needle which is pierced into the body of the person to be measured, wherein a signal processor which processes a signal including biological information from the sensor is attached to the device body, and the signal processor is connected to the sensor and allowed to dwell on a skin of the person to be measured at a location of insertion in which the detector is inserted into the body of the person to be measured, wherein said sensor inserting device further comprises: a dwelling member which is arranged on a moving path of the sensor and attached to the sensor by a movement of the sensor caused by the movement mechanism, characterized in that the dwelling member includes an engaging unit which supports the sensor at the location of insertion, a base which supports a state in which the supported sensor is connected to the signal processor, and an adhesive portion which sticks the base on to the skin of the person to be measured, wherein on a distal end portion of the device body, the dwelling member is arranged, and a signal processor displacement mechanism which allows the signal processor to slide toward the base, after inserting the detector into the body of the person to be measured, so as to be supported by the dwelling member. a dwelling member which is arranged on a moving path of the sensor and attached to the sensor by a movement of the sensor caused by the movement mechanism, characterized in that the dwelling member includes an engaging unit which supports the sensor at the location of insertion, a base which supports a state in which the supported sensor is connected to the signal processor, and an adhesive portion which sticks the base on to the skin of the person to be measured, wherein on a distal end portion of the device body, the dwelling member is arranged, and a signal processor displacement mechanism which allows the signal processor to slide toward the base, after inserting the detector into the body of the person to be measured, so as to be supported by the dwelling member.