A coupling assembly, particularly for dental implants, which comprises at least one pin (2), which can be coupled rigidly to a bone portion (A) and the like, and a supporting element (4), which can be associated with a prosthesis (B). The pin (2) has, at its end portion that lies opposite the one designed for connection to the bone portion (A), a protruding tab (5) that can be accommodated by elastic forcing in a respective cavity (6) formed in the supporting element (4) so as to produce a stable coupling configuration between the pin (2) and the supporting element (4). The tab (5) is shaped like a substantially equatorial portion of a sphere and its outer lateral surface is adapted to abut, with at least one of its parts, against the internal side walls of the cavity (6), so as to determine the stable coupling configuration.
