PROBLEM TO BE SOLVED: To provide a wall-surface greening room-air purifier capable of reducing or eliminating ducts for feeding air to be purified, eliminating the necessity of a big fan for blowing, and suppressing noise.SOLUTION: A wall-surface greening room-air purifier 1 comprises a plant growth board 2 on one surface of which plant 30 can be planted, and a ventilation layer forming component 4 that forms a ventilation layer 3 arranged along the other surface of the plant growth board 2. A mesh material 5 is interposed between the plant growth board 2 and the ventilation layer 3. In the plant growth board 2, a highly air permeable soil portion 2b is provided, penetrating both surfaces thereof, in which ventilation resistance in the penetration direction is smaller than the other part of the plant growth board 2. The outer periphery of the highly air permeable soil portion 2b is partitioned with a partition material 21a and a plant growth base material B is filled therein.
