The ankle foot orthosis solves a problem of a poor adaptation to a user's foot (3) and the related discomfort. It provides for simultaneous correction of several symptoms in the foot and ankle areas. It is completely produced from a uniform material, the thickness and shape of which change depending on user's specific needs. It is designed in such a way that it does not intervene with other functions of a user's foot. It is manufactured by preparing a 3D model of a user's foot when placed in a physiologically correct static position, by modelling the ankle foot orthosis directly to a 3D model of the foot (3), by 3D printing from preferably a photopolymer, and by adequate post-processing. Due to its minimalistic design, the user can wear the orthosis in a shoe of his appropriate foot size.