The topic of this paper is the design and prototyping of a mobile phone holder for use in personal car using the 3D printing method. Design guidelines were obtained by analyzing existing design solutions and comparing their disadvantages and advantages. The holders can be divided according to the method of installation, the place of installation and the method of holding the mobile phone. By dividing the holder into smaller units, it is easier to obtain the necessary information on which the necessary principle of operation of the new holder will be based. The principle of operation of the holder that best meets the requirements of the market has a mechanical grip of the mobile phone, the ability to adjust the orientation and inclination of the holder and is installed in the area of the ventilation openings. A new design solution for mobile device holders has been proposed, taking into account guidelines related to the construction and design of polymer parts and guidelines for the construction and manufacturing of parts using the 3D printing method. A prototype of the carrier was made by the method of 3D printing.