PROBLEM TO BE SOLVED: To provide a freeze-dried preparation that has excellent storage stability and has a short period of time for reconstitution thereof to water.SOLUTION: A freeze-dried preparation comprises bortezomib, arginine, acid and/or salt thereof.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】保存安定性が優れ、水への再構成時間が短い凍結乾燥製剤を提供すること。【解決手段】ボルテゾミブと、アルギニンと、酸および/またはその塩とを含む凍結乾燥製剤。【選択図】なし