Heating device for a wiper blade and wiper blade comprising such heating device

Heating device which comprises at least one vertebra (3) capable of being mounted longitudinally in a housing of a wiper blade, the so-called upper face (13) of the vertebra (3) being positioned opposite the actuation arm in the assembled position of the blade with the actuation arm; at least one heating element (2) of which a first part (14) is disposed on the upper face (13) of the vertebra (3). A second part (14') of the heating element (2) is disposed on the lower face (13') of the vertebra (3), opposite to the upper face (13), the first and second parts (14, 14') of the heating element (2) disposed on the upper face (13) and on the lower face (13') of the vertebra (3) being in electrical contact with one another.