<;P>;PROBLEM TO BE SOLVED: To provide a convenient medical device for attaining the facilitation and reliability of a procedure by appropriately grasping an organism tissue without damaging nor crushing the organism tissue, regardless of the shape of the organism tissue, and reliably joining the organism tissues. <;P>;SOLUTION: The medical device for performing joining with the use of a joining means 30 in a state where the organism tissues M1, M2 are aligned by superimposition includes a pressure sensor S at the distal end of a body rod 12 arranged in a catheter 11, which detects contact pressure between the organism tissues M1, M2. <;P>;COPYRIGHT: (C)2011,JPO&INPIT