The present invention provides: a pharmaceutical composition characterized in that a
specific antibody-
drug conjugate and another
drug are administered in combination; and / or a method of treatment, characterized in that a
specific antibody-
drug conjugate and another drug are administered to an individual in combination. A pharmaceutical composition in which an anti-CD37
antibody-drug conjugate and another drug (one or more drugs selected from the group consisting of a
molecular targeting drug, a drug associated with R-
CHOP therapy, a drug associated with R-
CHOP therapy, an alkylating agent and an immune tuning drug) are administered in combination, the anti-CD37
antibody-drug conjugate is an anti-CD37
antibody-drug conjugate in which a drug-
linker represented by the following formula (in the formula, A represents a binding position to the anti-CD37 antibody) is bound to the anti-CD37 antibody through a
thioether bond; and / or a method of treatment characterized by administering the anti-CD37 antibody-drug conjugate and the another drug in combination to an individual.