To provide a greening unit having high freedom of placement and whereby watering is easy, when arranging a plurality of plants in the vertical direction. A greening unit comprising at least one case member, said case member having a substantially longitudinal shape and being capable of being bent in the width direction. The greening unit: has fastener elements on both sides along the longitudinal direction； uses the case member as a hollow body, by joining said elements using a fastener slider； has a plant cultivation base material inserted in the inside of the hollow body； has at least two sliders arranged per one fastener structure； uses part of the fastener as an open section by adjusting the position of the slider； and is capable of having plants planted into the plant cultivation material, from the opening.
