Provided is a plant cultivation device whereby the workability in cutting the base of leaves can be improved. The plant cultivation device (1) comprises: cylinder-shaped medium-holding parts (45, 45a-45c) which contain and hold seedling medium (44a-44c) therein, are disposed in through holes (41a-41c) in a flow channel member (41), and allow the seedling medium (44, 44a-44c) to absorb a cultivation solution； and cylinder-shaped leaf-supporting parts (46, 46a-46c) which are provided above the medium-holding parts (45, 45a-45c) and support, from the periphery, leaves (91) growing from seeds. The medium-holding parts (45, 45a-45c) and the leaf-supporting parts (46, 46a-46c) are configured so that a cutter (50), said cutter (50) being to be used for separating the leaves (91) from the seedling medium (44, 44a-44c), can be inserted from outside at the boundary between the medium-holding parts (45, 45a-45c) and the leaf-supporting parts (46, 46a-46c).
