Problem to be solved: To improve the quality of a cultivation bag by preventing the cultivation bag filled with a medium from being turned up during conveyance with a simple configuration. Solution: a clamp movable between a loading position for holding a cultivation bag and a loading/unloading position for loading/unloading the held cultivation bag is provided, the clamp is provided with a first movable part 1 and a second movable part 2 respectively movable in a direction of approaching/separating from one side surface part and a fixed part immovable in a direction of approaching/separating from the side surface part of the cultivation bag, And the (1) th movable part has a base surface part for separating from and contacting with the (2) th movable part and a support plate part bent to the base surface part and supporting a bottom surface part of the cultivation bag from below, The (2)...

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