Problem to be solved: To provide a storage box capable of covering a tissue storage part corresponding to the size of tissue. [Solution] a storage box 10 includes a bottom surface part 20 having a long side 21 extending in a first direction X and a short side 22 extending in a second direction Y, a first side surface part 30 and a second side surface part 40 arranged along the long side 21 and facing the second direction Y, And a third side surface part 50 and a fourth side surface part 60 facing the first direction X, the first side surface part 30 is formed with a tissue take-out port 35, and between the first side surface part 30 and the second side surface part 40, A first storage part 11 capable of storing tissue 14 is formed in an internal space in contact with the first side...

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