[Problem] There has been needed a greening unit in which watering is simple and flexibility in installation is high when arranging a number of plants in the vertical direction.[Solution] The greening unit includes at least one or more case members. Each of the case members is substantially rectangular, can be bent in the width direction, and has an element of a fastener on each side along the longitudinal direction. The element is closed by sliders of a fastener to form a hollow body constituted by the case member. A plant cultivation base material is poured into the hollow body. Two or more of the sliders are disposed to one fastener structure. Positions of the sliders are adjusted to form an opening along part of the fastener. A plant can be planted to the plant cultivation base material through the opening.
