The present invention is supported in all directions between the support body for the medical device, a robotic arm and medical instruments The robot arm is carried by a fixed or fixed by turning off of each joint which at one time through the operation of the switch only convenient fixed or fixed release of each joint provided in the medical device is not fixed, and according to a fixed time to release also includes that the retainer on the joint of the robot arm is provided with a medical device that takes only the time to operate with a single switch, regardless of the number, which is provided on the support body (1) for medical devices (3), medical instruments (9 ), the support (3) and in the medical device having at least one robot arm (5,7) connected between a medical tool (9), connected to the support (3), at least one robot arm (5,7 ), and that between the medical tool 9 to rotate in all directions by, include joints (100,200,300) consisting of the same configuration, and wherein the joint part 200, sutgo unit (211) is provided with an upper fixing member to the lower (212 ) is fixed to the inner side, the work space sutgo 213 directly under the section (211) is formed, the lower inlet is open space 214 is formed is formed in which the inlet space 214 and the working space 213 and the upper joint body 210 has a structure that is in communication The upper side to be fixed to the fixed insert member 220, an electromagnet power supply 220 is supplied from the outside and is magnetized To be located in the working space 213 of the upper joint body 210, the upper surface sutgo amgo the interlocking in government 211 section 231 is provided, the vertical guide groove formed in the metal material 232 is on the lower and a lower pivoting member 230 The upper joint body 210 is hollow or 221 is formed in the electromagnet 220, is formed to be embedded in the hollow 221, and the one side lies on the inner upper side of the upper joint body 210, the other side is plac
