The present invention relates to a composite formed into a single layer, comprising: (i) candesartan or candesartan cilexetil or a pharmaceutically acceptable salt thereof； (ii) amlodipine or a pharmaceutically acceptable salt thereof； (iii) triethyl citrate as a stabilizer； and (iv) mannitol as a filler. The composite of the present invention has improved stability of candesartan during preparation processing and storage, has an excellent dissolution rate, and has an effect of facilitating preparation into a formulation such as a tablet.
