A rack for an aeronautical platform comprising two parallel shelves positioned between a front face and a rear face of the platform, the rack being inserted into the platform by translation from the front face to the rear face the rack containing electronic equipment extending primarily in a plane, the electronic equipment being positioned in a useful compartment of the rack and cooled by forced convection. The electronic equipment is positioned in such a way that its main plane is parallel to the shelves. The rack comprises means for guiding an air flow used for the cooling of the electronic equipment item, the air flow penetrating into the useful compartment parallel to the plane of the electronic equipment item and at right angles to the direction of insertion of the rack into the platform.