The invention pertains to a sacrificial anode for cathodic corrosion protection that comprises an anode body (1), a mounting component (8) for mounting the sacrificial anode on the device to be protected, an insulating component (4) that in certain areas surrounds the anode body (1) and electrically insulates the anode body (1) from the mounting component (8), and a resistive element (9) that is inserted between the anode body (1) and the mounting component (8), where the insulating component (4) is fixed on the mounting component (8). According to the disclosure, a securing component (6) is fixed on the anode body (1) and prevents the anode body (1) from moving out of the insulating component (4). This results in a sacrificial anode of this type that can be reliably operated over its entire service life.