The invention relates to a prosthetic foot comprising a core (2) on which a proximal fastening device (3) for fastening the prosthetic foot (1) to a lower leg tube or to a lower leg shaft is arranged and which is surrounded by a foot casing (4) which forms a cavity (41) in which the core (2) is inserted wherein a slot shaped recess (45) is formed in a front foot region (42) of the foot casing (4) into which slot shaped recess a tongue (5) arranged on the core (2) is inserted and the front foot region (42) has a stiffness that deviates in comparison with the rest of the foot casing (4).
