A drug product which can maximize the effect of a cholestanol glycoside useful as an anticancer agent. The present invention provides a liposomal composition containing a glycoside exhibiting antitumor activity, a phospholipid, and a positive-charge-providing substance; the glycoside being composed of GlcNAc-Gal-, GlcNAc-Gal-Glc-, Fuc-Gal-, Gal-Glc-, or Gal- as a sugar moiety, and a hydrophobic compound capable of forming a liposome.