Provided is a plant growth apparatus including: an apparatus main body having a growth space configured to grow a plant therein； an illumination device configured to irradiate light to the plant； and air conditioning device configured to control the internal air of the growth space. The illumination device includes a plurality of light source units provided separately from the apparatus main body. The air conditioning device includes a plurality of air conditioners provided separately from the apparatus main body. One of the plurality of light source units and/or one of the plurality of air conditioners is/are selected and connected to the apparatus main body.
