PROBLEM TO BE SOLVED: To provide a stable exosome preparation. The present invention provides a lyophilized exosomes formulations which stably suitable for administration to humans comprising at least 10 6 exosomes, lyophilizing exosomes is at least 90% of the level of miR-210 RNA in exosomes formulation before freeze-drying and A formulation that maintains miR-146A. [Selection diagram] None【課題】安定したエクソソーム製剤の提供。【解決手段】少なくとも106のエクソソームを含むヒトへの投与に適した安定した凍結乾燥エクソソーム製剤であって、凍結乾燥エクソソームが、凍結乾燥前のエクソソーム製剤の少なくとも90%レベルのmiR-210 RNA及びmiR-146Aを維持する、製剤。【選択図】なし