The present invention provides a planting device for plants to be formed mainly on a rooftop, a roof of a building, or the like. The planting device for plants comprises a body portion provided with a first fixing means and a second fixing means. The first fixing means is firmly fixed to a mounting surface of the body portion. The second fixing means is linked to the first fixing means. The body portion is provided at a bottom with a water draining means, a water retaining means and the first fixing means. A water receiving means is provided at a side wall of the body portion. Soil is filled into a surrounding space enclosed with the side walls and desired plants (or a desired plant) are planted on the soil. A planting structure in which multiple adjacently arranged planting devices may be used is also provided.
