The invention relates to a device for indicating wear on the friction lining of a brake shoe of a disc brake, having an electrically conductive unit which comes into electrical contact with the brake disc when a first predetermined wear limit is reached during braking, wherein the electrically conductive unit is elongate and a section adjacent to the section lying closest to the brake disc in the installed state forms an angle between 0° and 90°, preferably between 2° and 20°, more preferably between 8° and 16° with the plane of the brake disc. Other embodiments may be described and/or claimed.