A ventilation-mounted holder for attachment on a ventilation lamella assembly in vehicles for mounting electronic devices or other articles includes a carrier body onto which a holding bracket for engagement over a ventilation lamella is arranged on the backside, and a holding device for a smartphone or a tablet is arranged on the front side. The carrier body is configured as an elongated carrier arm. The holding bracket and at least one further holding bracket are each arranged rotatably and spaced apart from one another on an end region of the carrier arm, and the holding device is arranged on the opposite end region of the carrier arm.