A device (12) for implanting a tissue prosthesis comprises an elongate support member (14) having a proximal end (16) and a distal end (13), the support member (14) defining a recessed receiving zone 20 at a distal region for receiving at least a part (22) of the implant in a collapsed configuration. A cover member (24) having a proximal end (26) and a distal end (28) is arranged on the support member (14) to over at least the receiving zone (20) of the support member (14), the cover member (24) being removably arranged relative to the support member (14) to provide access to the receiving zone (20), the cover member (24) and the support member (14) together defining an insertion assembly (32). An insertion formation is defined at the distal end (18) of the insertion assembly (32) for facilitating insertion of at least a distal part of the insertion assembly (32) into position relative to a site in a patients body in which the implant is to be located, in use, so that, upon removal of the cover member (24), the part (22) of the implant is positioned at the site.
