Disclosed is a device for positioning a resurfacing prosthesis, including: a gripping and handling instrument for a main body of a resurfacing prosthesis; a connecting body, interposed between said gripping and handling instrument and said main body of said resurfacing prosthesis and suitable to connect them; a coupler which secures said connecting body to said main body, said coupler comprising: a plurality of bonding elements adapted to be interlocked, in an irremovable manner, in respective recesses provided in said connecting body; and a shear releaser, interposed between said main body of said resurfacing prosthesis and said connecting body, adapted to detach said connecting body from said main body. Other aspects are described and claimed.