A subtalar implant (1) for stabilizing the subtalar joint in the human foot includes a longitudinal axis (L) extending between a front end (13) and a rear end (14), wherein a first anchor portion (2) is arranged to the side of the longitudinal axis (L) and a second anchor portion (3) is arranged to the side of the longitudinal axis (L). In accordance with the invention, a spreading mechanism (5) to spread apart the implant as a result of relative displacement of the first and second anchor portion (2, 3) at an angle to the longitudinal axis (L) are provided.