PROBLEM TO BE SOLVED: To provide a method for treating a human subject liable to suffer from tumors expressing ErbB2 protein or diagnosed on the tumor.SOLUTION: Provided is a treating method comprising: (a) treating with a therapeutically effective amount of an anti-ErbB2 antibody; (b) surgically removing the tumor; and (c) treating with a therapeutically effective amount of a chemotherapeutical agent. Optionally, the step (a) further comprises treatment with a therapeutically effective amount of a chemotherapeutic agent. The tumor excessively expresses ErbB2 protein, and is selected from breast tumor, squamous cell tumor, small cell lung tumor, non-small cell lung tumor, gastrointestinal tumor, pancreatic tumor, glioblastoma, cervical tumor, ovarian tumor, liver tumor, bladder tumor, hepatoma, colon tumor, colorectal tumor, endometrial tumor, saliva gland tumor, kidney tumor, liver tumor, prostate tumor, vulval tumor, thyroid tumor, liver tumor, head tumor and neck tumor.SELECTED DRAWING: None【課題】ErbB2タンパク質を発現する腫瘍を患いやすい又はその腫瘍であると診断されたヒト患者の治療方法の提供。【解決手段】(a)治療的有効量な量の抗ErbB2抗体によって治療すること、(b)外科的に腫瘍を除去すること、(c)治療的有効量な量の抗ErbB2抗体又は化学療法剤によって治療すること、を含む治療方法。段階(a)が、更に治療的有効量の化学療法剤によって治療することを含む治療方法。腫瘍がErbB2タンパク質を過剰発現する乳腫瘍、扁平上皮細胞腫瘍、小細胞肺腫瘍、非小細胞肺腫瘍、胃腸腫瘍、膵臓腫瘍、神経膠芽細胞腫瘍、子宮頸腫瘍、卵巣腫瘍、肝臓腫瘍、膀胱腫瘍、肝細胞腫瘍、大腸腫瘍、結腸直腸腫瘍、子宮内膜腫瘍、唾液腺腫瘍、腎臓腫瘍、肝臓腫瘍、前立腺腫瘍、産卵口腫瘍、甲状腺腫瘍、肝腫瘍、頭部腫瘍、頸部腫瘍から選択される腫瘍。【選択図】なし