The present invention provides: an antibody-drug conjugate of an anti-IL-7R antibody; and a pharmaceutical composition for treating cancer or inflammation and containing an antibody-drug conjugate of an anti-IL-7R antibody and a cytotoxic drug. The present invention provides: an antibody-drug conjugate of an anti-IL-7R antibody and a cytotoxic drug; and a pharmaceutical composition for use in treatment of cancer or inflammation, and containing an antibody-drug conjugate of an anti-IL-7R antibody and a cytotoxic drug.[課題]本發明提供一種抗IL-7R抗體之抗體藥物共軛物與處置癌或發炎用之包含抗IL-7R抗體與細胞傷害劑之抗體藥物共軛物之醫藥組成物。 [解決手段]藉由本發明可提供一種抗IL-7R抗體與細胞傷害劑之抗體藥物共軛物,與一種包含抗IL-7R抗體與細胞傷害劑之抗體藥物共軛物之醫藥組成物,且其為處置癌或發炎用之醫藥組成物。