This idea is about a bio air purifier by attaching a fan in the pot of a plant that does not require any filter to be change . The D.C fan will placed in a slot created at the outer surface of plant pot . This fan will suck the air from surface of soil at the top of the plant then the air will be purified inside soil and is taken out through this fan. This consumes very less electricity and is much cheaper than the air purifiers available in market . Also the plants that can planted in this pot should have high pollution absorbing property like snake plant,spider plant etc.