Micelle containing epirubicin-complexed block copolymer and anti-cancer agent, and pharmaceutical composition containing said micelle applicable to treatment of cancer, resistant cancer or metastatic cancer

The problem addressed by the present invention is to develop a pharmaceutical having therapeutic efficacy against epirubicin-resistant tumors. The present invention provides a micelle having an anti-cancer agent disposed inside the core of the micelle formed by an epirubicin-complexed copolymer.