To provide flower pot holding case structure that can easily obtain optimum cultivation environment for plants such as an orchid having a liking for ventilation and protect the plants from the harm of slugs.

Pot receiving parts 3 of bowl shape opened at the upper face are provided at a case body 1 of a flower pot holding case 30 for holding pots 20 each of which has a plurality of air hole parts 26 formed in the peripheral surface of a pot body 21 of bowl shape opened at the upper face, a drip hole 25 formed in a bottom part, and a collar part 23 formed at the outer peripheral part of an opening part 22 of the upper face. A plurality of air holes 6 are circumferentially formed in the peripheral surface of each pot receiving part 3, and a drip hole 5 is formed in the bottom part of the pot receiving part 3. The collar part 23 of the pot 20 is brought into contact with the peripheral part of an opening part 4 of the pot receiving part 3, and the pot 20 is held to the pot receiving part 3 in the state of the pot 20 being suspended in the pot receiving part 3 without the peripheral surface part and bottom part of the pot 20 coming in contact with the inner peripheral surface and bottom part of the pot receiving part 3.