The invention concerns an implant for adjusting the position of at least one tissue holder (6) for soft tissue, whereby this implant can be fixed to bone tissue at a distance from said tissue holder (6) and has a guide (3) for an elongate pulling member (4), whereby this pulling member (4) is connected to said tissue holder (6), and whereby the implant includes a fixing element (10) which can be moved between a fixing position in which the pulling member (4) is clamped by the fixing element (10) and a free position in which said pulling member (4) can freely move through said guide (3), wherein said fixing element (10) cooperates with a control element (14) which makes it possible to move this fixing element (10) between said fixing position and said free position when the implant is attached to said bone tissue and when the implant is covered with soft tissue such as muscle tissue or skin tissue. Said fixing element (10) is made of a memory metal or a bimetal and said control element is formed of a cold or heat source.
