Disclosed are protein p14 which exhibits anti-cancer and anti-allergy activity, and a pharmaceutical composition for the treatment, management, alleviation, improvement or prevention of cancer and/or allergic diseases, comprising the same. The composition guarantees excellent anticancer effects with minimal side effects. Protein p14 induces the synthesis of IFN-gamma and regulates the production of IL-4, thus exhibiting preventive or therapeutic effects on allergic diseases.