Support for multipurpose carrying bars of motor cars

Support for multipurpose carrying bars and the like to be fitted to the roof (1,1a;1,1b) of motor cars, comprising a base (10) for resting on the roof (1), a column (20) which can be positioned on top of said base (10) and is able to support a bar (40), a cover (30) for locking the said bar (40), as well as fastening means (23;61,123) acting in a direction perpendicular to the roof (1), for locking the column (20) and the base (10) to the latter.