The invention relates to a shoe, especially to a sports shoe, comprising a shoe upper (1) and a sole (2), wherein at least one actuator (3) is arranged in the sole (2), by means of which a region of the contact surface (4) for the foot of the wearer of the shoe can be affected with regard to the geometry of the contact surface (4) at least in a defined length range (BL) and/or width range (BB) of the sole (2) relatively to the position of the contact surface (5) of the sole (2) on the ground. In order to make the required actuating motion of the actuator using little energy, the invention proposes that the actuator (3) comprises a support element (6) supporting the foot of the wearer, which is pivotally disposed relatively to a base part (7) around an axis (A), wherein at least one hydraulic chamber (8, 9) having a variable volume is arranged on each side of the axis (A) between the support element (6) and the base part (7), which are completely filled with a substantially incompressible medium, wherein the at least two hydraulic chambers (8, 9) are fluidically connected to each other by means of a conduit (10) in which a switchable valve (11) is disposed.