This medical treatment device comprises first and second holding members 8, 8 capable of clamping a biological tissue. The first and second holding members 8, 8 include: energy applying parts 821, 821 which have treating surfaces 8231, 8231 that come in contact with the biological tissue when the biological tissue is clamped by the first and second holding members 8, 8, and which apply energy to the biological tissue and pressing parts 822, 822 which have pressing surfaces 8221, 8221 that are disposed around the treating surfaces 8231, 8231 and press the biological tissue. The treating surfaces 8231, 8231 and pressing surfaces 8221, 8221 are able to move relative to each other and change from a first positional relationship in which the pressing surfaces 8221, 8221 protrude from the treating surfaces 8231, 8231 to a second positional relationship in which the treating surfaces 8231, 8231 are flush with the pressing surfaces 8221, 8221 or the treating surfaces 8231, 8231 protrude from the pressing surfaces 8221, 8221.La présente invention concerne un dispositif de traitement médical qui comprend des premier et second éléments de maintien (8, 8) capables de serrer un tissu biologique. Les premier et second éléments de maintien (8, 8) comprennent : des parties dapplication dénergie (821, 821) qui ont des surfaces de traitement (8231, 8231) qui entrent en contact avec le tissu biologique lorsque le tissu biologique est serré par les premier et second éléments de maintien (8, 8), et qui appliquent lénergie au tissu biologique et des parties de compression (822, 822) qui ont des surfaces de compression (8221, 8221) qui sont disposées autour des surfaces de traitement (8231, 8231) et compriment le tissu biologique. Les surfaces de traitement (8231, 8231) et les surfaces de compression (8221, 8221) sont capables de se déplacer les unes par rapport aux autres et de passer dune première relation positionnelle dans laquelle les surfaces de compression (8221, 8221) font saillie
