The support (300) is intended to be fixed in a housing provided in the drone, through a mechanical interface (310) made of a material absorbing the mechanical vibrations. The mechanical interface, annular in shape, is intended to be attached to a corresponding annular shoulder provided in the housing. A fastening part (301) for fixing the support in the housing carries the mechanical interface (310), with at least one connection leg (302) supporting the navigation electronic card (320) and mounted free at one end on the fastening part. A battery (400) for the power supply of the drone is further accommodated in the support. The navigation electronic card may notably include a navigation sensor (321) such as an accelerometer, placed on the card in such a manner to be positioned at the barycenter of the drone.