A medical inserting apparatus, comprising: a screw nail (10, 110) which is adapted to be inserted into a human body; a driver (20, 120) which allows to insert the screw nail (10, 110) into the human body; a current generator (60, 160) disposed in the driver (20, 120) to generate a predetermined current; a current meter (70, 170) disposed in the driver (20, 120) to measure the current; and a conductor element (50, 150) disposed in the screw nail (10, 110) and the driver (20, 120) along a lengthwise direction and including an exposed portion which is exposed to outside, wherein the conductor element (50, 150) includes a forward conductor element (30, 130, 140) connected to the current generator (60, 160) to allow the current generated by the current generator (60, 160) to flow into the human body, and a reverse conductor element (40, 135, 145) having one end electrically connected to the forward conductor element and the other end connected to the current generator (60, 160), and including a resistor (80, 180) and the current meter (70, 170) installed to allow the current generated by the current generator (60, 160) to flow to the current meter (70, 170) by current division with resistance of the human body, characterized in that the resistor is a variable resistor (80, 180), wherein the medical inserting apparatus is adapted to calculate a resistance value of the human body tissue into which the current flowed through the amount of current measured by the current meter (70, 170) and the resistance value of the variable resistor (80,180), and to identify a type of the tissue by comparing the calculated resistance value and an inherent resistance value of the tissue. a screw nail (10, 110) which is adapted to be inserted into a human body; a driver (20, 120) which allows to insert the screw nail (10, 110) into the human body; a current generator (60, 160) disposed in the driver (20, 120) to generate a predetermined current; a current meter (70, 170) disposed in the driver (20, 120) to measure the current; and a conductor element (50, 150) disposed in the screw nail (10, 110) and the driver (20, 120) along a lengthwise direction and including an exposed portion which is exposed to outside, wherein the conductor element (50, 150) includes a forward conductor element (30, 130, 140) connected to the current generator (60, 160) to allow the current generated by the current generator (60, 160) to flow into the human body, and a reverse conductor element (40, 135, 145) having one end electrically connected to the forward conductor element and the other end connected to the current generator (60, 160), and including a resistor (80, 180) and the current meter (70, 170) installed to allow the current generated by the current generator (60, 160) to flow to the current meter (70, 170) by current division with resistance of the human body, characterized in that the resistor is a variable resistor (80, 180), wherein the medical inserting apparatus is adapted to calculate a resistance value of the human body tissue into which the current flowed through the amount of current measured by the current meter (70, 170) and the resistance value of the variable resistor (80,180), and to identify a type of the tissue by comparing the calculated resistance value and an inherent resistance value of the tissue.