PROBLEM TO BE SOLVED: To provide a pharmaceutical composition for treating a patient having autoimmune diseases at lower frequency, with lower doses, or at lower frequency and with lower doses.SOLUTION: The present invention provides pharmaceutical composition for treating an autoimmune disease comprising a pharmaceutically acceptable carrier and an agent capable of activating CD4CD25regulatory T cells. The composition is to be administered to a subject at most every 3 days.【課題】より低頻度、より低用量、又はより低頻度且つより低用量で自己免疫疾患患者を治療可能な医薬組成物の提供。【解決手段】薬学的に許容される担体と、CD4+CD25+制御性T細胞を活性化可能な剤とを含む自己免疫疾患を治療するための医薬組成物であって、多くても3日に1回対象に投与される医薬組成物の提供。【選択図】なし