There have been many trials of clinical efficacy of multi component and single component treatments for irritable bowel syndrome(IBS). We reviewed effects of non phamacological treatments in the illS. Though the efficacy of multi-component approaches was unclear, several results suggest that cognitive behavioral therapy was effective in improving gastrointestinal symptoms of IBS. As a single component. cognitive therapy and relaxation with or without biofeedback could improve the symptoms and psychological health of IBS patients. Yoga, meditation, self-help information and hypnotherapy could be applicable to IBS.