Abstract: The present invention relates to a method for the prevention or for the treatment of psoriasis comprising administering to a patient in need thereof an effective amount of an isolated antibody, or one of its functional fragments, capable of binding to the human insulin-like growth factor I receptor IGF-IR. The present invention is also directed to said method wherein a second compound selected from the compounds capable of specifically inhibiting the attachment of the EGF to the human epidermal growth factor receptor EGFR, such as an isolated anti-EGFR antibody, or a functional fragment thereof, is administered to the patient in addition to the anti-IGR-IR antibody.