Polymer micelles containing calcium phosphate (CaP) minerals on the shell domain were developed by nanotemplate-driven mineralization. The polymer micelle nanotemplate was prepared by self-assembly of a poly(epsilon-caprolactone)-b-poly(methacrylic acid) (PCL-b-PMAA) copolymer. PMAA formed the anionic outer shell, and PCL constructed the hydrophobic inner core. Subsequent addition of calcium and phosphate ions to micellar solutions induced CaP mineral deposition within the PMAA shell domain. Transmission electron microscopy (TEM) showed the well-defined nanostructure consisting of the CaP nanoshell and the PCL inner core. Energy-dispersive X-ray spectroscopy (EDS) confirmed CaP deposition on polymer micelles. Dynamic light scattering (DLS) study showed CaP mineralization greatly enhanced the micellar stability.