An implantable device (1, 1') for bringing together fragile anatomical structures, comprising: a) an elongate element (2, 21, 22), intended to cross from side to side the anatomical structures (15, 16) to be brought together; b) at least one first bearing part (3, 23, 30) disposed over the length of said elongate element (2, 21, 22) and including a contact face (3a, 23a) intended to be applied to one of the anatomical structures (15, 16) to be brought together and having, at least in part, open pores allowing the development of cicatricial fibrosis; c) at least one blocking part (4, 5, 6, 7) disposed over the length of said elongate element (2, 21, 22) at a given distance D from the contact face (3a, 23a, 31a) of said first bearing part (3, 23, 30); d) at least one second bearing part (8, 24) including a contact face intended to be applied to another of the anatomical structures (15, 16) to be brought together and having, at least in part, open pores allowing the development of a cicatricial fibrosis, said second bearing part (8, 24) being able to slide over the length of the elongate element (2, 21, 22) and being shaped so that, during implantation, the blocking part (4, 5, 6, 7) is forced through the second bearing part (8, 24) and abuts thereagainst; each first bearing part (3, 23, 30) consisting of a rigid or semirigid main body and of a flexible part (32, 33) which projects radially along all or part of the periphery of the main body and which is able to pass from an insertion position in which it is folded over itself to an implantation position in which it is deployed so as to be applied on one of the anatomical structures to be brought together, the face of the flexible part (32, 33) which, during implantation, is intended to be applied on the anatomical structure (15, 16) being able to develop a cicatricial fibrosis. a) an elongate element (2, 21, 22), intended to cross from side to side the anatomical structures (15, 16) to be brought together; b) at least one first bearing part (3, 23, 30) disposed over the length of said elongate element (2, 21, 22) and including a contact face (3a, 23a) intended to be applied to one of the anatomical structures (15, 16) to be brought together and having, at least in part, open pores allowing the development of cicatricial fibrosis; c) at least one blocking part (4, 5, 6, 7) disposed over the length of said elongate element (2, 21, 22) at a given distance D from the contact face (3a, 23a, 31a) of said first bearing part (3, 23, 30); d) at least one second bearing part (8, 24) including a contact face intended to be applied to another of the anatomical structures (15, 16) to be brought together and having, at least in part, open pores allowing the development of a cicatricial fibrosis, said second bearing part (8, 24) being able to slide over the length of the elongate element (2, 21, 22) and being shaped so that, during implantation, the blocking part (4, 5, 6, 7) is forced through the second bearing part (8, 24) and abuts thereagainst; each first bearing part (3, 23, 30) consisting of a rigid or semirigid main body and of a flexible part (32, 33) which projects radially along all or part of the periphery of the main body and which is able to pass from an insertion position in which it is folded over itself to an implantation position in which it is deployed so as to be applied on one of the anatomical structures to be brought together, the face of the flexible part (32, 33) which, during implantation, is intended to be applied on the anatomical structure (15, 16) being able to develop a cicatricial fibrosis.