Avoidant/restrictive food intake disorder (ARFID) is a rarely diagnosed disorder in children, adolescents and adults, which is largely due to its relatively recent appearance in the classification of mental disorders. Numerous studies are undertaken abroad in order to increase knowledge about ARFID and search for standards of diagnosis and evidence-based treatment. Therapeutic protocols are proposed, based on cognitive-behavioral therapy, and Family-Based Treatment (FBT) is also used. The author presents the therapeutic interactions undertaken abroad in the treatment of ARFID, at the same time, combining own experience in working with the patient and data from the latest publications, proposes a treatment protocol and describes individual stages of the therapeutic procedure.