PROBLEM TO BE SOLVED: To provide a pharmaceutical composition for treating inflammatory disease related to HTLV-1, particularly, HTLV-1 related myelopathy (HAM) or HTLV-1 related uveitis (HU).SOLUTION: A pharmaceutical composition for treating inflammatory disease related to HTLV-1 contains, as an active ingredient, an anti-TfR antibody that specifically binds to human transferrin receptor (TfR).SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】HTLV-1に関連する炎症性疾患、特に、HTLV-1関連脊髄症(HAM)又はHTLV-1関連ぶどう膜炎(HU)を治療するための医薬組成物の提供。【解決手段】ヒトトランスフェリン受容体(Transferrin receptor: TfR)に特異的に結合する抗TfR抗体を有効成分として含む、HTLV-1に関連する炎症性疾患を治療するための医薬組成物。【選択図】なし