A stand, comprising: first to fourth links arranged in a parallelogram configuration, the third link being arranged on an opposite side of the first link ; first to fourth joints to which each connection part of the first to fourth links is rotatably connected respectively, the second joint being fixed to a holding unit and the second joint and the fourth joint being arranged in a diagonal direction in the parallelogram configuration; a front link extended from the first link in a direction from the fourth joint toward the first joint ; a first extension link rotatably connected to the second joint ; a first extension joint arranged at an end of the first extension link ; a second extension link rotatably connected to the first extension joint ; a second extension joint arranged at an end of the second extension link ; a third extension link rotatably connected to the second extension joint ; a third extension joint arranged at an end of the third extension link ; a fourth extension joint arranged at an end of the front link ; a fourth extension link arranged between the third extension joint and the fourth extension joint ; a fifth extension link arranged between the first joint and the second extension joint ; and an extension front link extended from the fourth extension link , wherein a predetermined apparatus (M) is mounted to a tip of the extension front link , wherein both ends of the second link are connected to the first joint and the second joint respectively, wherein each of the second extension link and the third extension link is placed in parallel with the second link and the front link respectively, and characterized by further comprising a counterbalance unit placed on an opposite side of the apparatus (M), and wherein the first extension link , the fourth extension link and the fifth extension link are in parallel with one another. first to fourth links arranged in a parallelogram configuration, the third link being arranged on an opposite side of the first link ; first to fourth joints to which each connection part of the first to fourth links is rotatably connected respectively, the second joint being fixed to a holding unit and the second joint and the fourth joint being arranged in a diagonal direction in the parallelogram configuration; a front link extended from the first link in a direction from the fourth joint toward the first joint ; a first extension link rotatably connected to the second joint ; a first extension joint arranged at an end of the first extension link ; a second extension link rotatably connected to the first extension joint ; a second extension joint arranged at an end of the second extension link ; a third extension link rotatably connected to the second extension joint ; a third extension joint arranged at an end of the third extension link ; a fourth extension joint arranged at an end of the front link ; a fourth extension link arranged between the third extension joint and the fourth extension joint ; a fifth extension link arranged between the first joint and the second extension joint ; and an extension front link extended from the fourth extension link , wherein a predetermined apparatus (M) is mounted to a tip of the extension front link , wherein both ends of the second link are connected to the first joint and the second joint respectively, wherein each of the second extension link and the third extension link is placed in parallel with the second link and the front link respectively, and characterized by further comprising a counterbalance unit placed on an opposite side of the apparatus (M), and wherein the first extension link , the fourth extension link and the fifth extension link are in parallel with one another. <EOS>