PROBLEM TO BE SOLVED: To provide novel treatment agents and treatment devices for cancer, inflammatory disease and allergic disease.SOLUTION: A cancer treatment agent comprises an immunoglobulin or an anti-Gr-1 antibody (anti-CD66b antibody), an anti-CD33 antibody or an anti-CD11b antibody as an active ingredient. There is also provided a novel use of a device that removes a granulocyte to cancer treatment.SELECTED DRAWING: None【課題】癌、炎症性疾患及びアレルギー疾患の新規な治療薬、治療機器の提供。【解決手段】免疫グロブリン又は抗Gr-1抗体(抗CD66b抗体)、抗CD33抗体若しくは抗CD11b抗体を有効成分として含む癌治療薬。顆粒球を除去する機器の癌治療への新規用途。【選択図】なし