The support and connection unit (1) of a camera (10), comprises: a first part (2) intended to be fixed to an installation surface, for example a wall, comprising a first electronic means (21) for the conveyance of signals and provided with connectors (22, 23, 24) for the transmission of signals outwardly, and a second part (3), intended to be coupled to a camera (10), comprising a second electronic means (31), connectable to the first electronic means (21) and adapted to convey the signals produced by the camera (10). The first and the second part (2, 3) may be removably coupled, defining a closed container (25, 32) which houses the first and the second electronic means (21, 31). The first and the second electronic means (21, 31) are placed in the respective part (2, 3) so as to mutually connect following the coupling of the first and the second part (2, 3).