The present invention relates to a compound having a macromolecular carrier having a plurality of terminal groups, wherein the carbonyl group of serine is linked by a peptide bond or an ester bond directly or via a linker to the terminal groups, a carrier for drug delivery composed of the compound, and a medicament for preventing or treating renal diseases, containing the carrier for drug delivery and a drug bonded to the carrier directly or via a linker or encapsulated therein. According to the present invention, a carrier for drug delivery that is selectively accumulated in kidney in vivo can be provided.
