Connection device of a portable electronic equipment with anchorage device provided with a magnetic support, particularly in the car driver and passenger compartment having ventilation air vents of the type provided with fins. The magnetic base has an attraction seat to house the coupling interface of the coupling plate with the coplanar approaching at least two permanent magnets reciprocally attracted one another, axially magnetized with inverted polarity. The magnetic base joined to the anchorage device has an attraction seat with a concave configuration with spherical cap section. The anchorage device is a clamp including two movable jaws, reciprocally articulated one another at a first end, with a cam-shaped surface relatively to the base of the first end, which insists in correspondence of an adjustment locknut, with respect to which a screw passes through coaxially. The magnetic base with attraction seat is associated with the locknut.