A protective device for protecting fences comprising horizontal and/or vertical elements of structure, the protective device comprising: a) a damper of the device, b) a covering of the device, wherein - the damper is a padded object, comprising a first group of V-shaped notches, each of the notches having an angle "α1" defining the V-shaped form thereof, and at least a second group of V-shaped notches, each of the second notches having an angle "α2" defining the V-shaped form thereof, wherein, the angle "α2" of the second group of notches is different from the angle "α1" of the first group of notches, each notch of the first group of notches is separated a distance "a" from its neighboring notch of the first group of notches, each notch of the second group of notches is separated a distance "b" from its neighboring notch of the second group of notches, and the first notch of a first group is separated a distance "c" from the closest notch of the nearest second group of notches, for the purpose of adapting the protective device to the horizontal and/or vertical elements of the structure of the fence; - the covering is a band of impermeable material which is placed on the damper, said covering of the protector having a sheet projecting on one of the sides thereof, for the purpose of allowing it to overlap another immediately contiguous strip of another adjacent protector; - the covering and the damper are attached by means of an attachment element. a) a damper of the device, b) a covering of the device, wherein - the damper is a padded object, comprising a first group of V-shaped notches, each of the notches having an angle "α1" defining the V-shaped form thereof, and at least a second group of V-shaped notches, each of the second notches having an angle "α2" defining the V-shaped form thereof, wherein, the angle "α2" of the second group of notches is different from the angle "α1" of the first group of notches, each notch of the first group of notches is separated a distance "a" from its neighboring notch of the first group of notches, each notch of the second group of notches is separated a distance "b" from its neighboring notch of the second group of notches, and the first notch of a first group is separated a distance "c" from the closest notch of the nearest second group of notches, for the purpose of adapting the protective device to the horizontal and/or vertical elements of the structure of the fence; at least a second group of V-shaped notches, each of the second notches having an angle "α2" defining the V-shaped form thereof, wherein, the angle "α2" of the second group of notches is different from the angle "α1" of the first group of notches, each notch of the first group of notches is separated a distance "a" from its neighboring notch of the first group of notches, each notch of the second group of notches is separated a distance "b" from its neighboring notch of the second group of notches, and the first notch of a first group is separated a distance "c" from the closest notch of the nearest second group of notches, for the purpose of adapting the protective device to the horizontal and/or vertical elements of the structure of the fence; - the covering is a band of impermeable material which is placed on the damper, said covering of the protector having a sheet projecting on one of the sides thereof, for the purpose of allowing it to overlap another immediately contiguous strip of another adjacent protector; - the covering and the damper are attached by means of an attachment element.