To provide a gas supplying apparatus for plant cultivation which has a simple apparatus configuration and is capable of supplying gas suitable for the growth environment of a plant.SOLUTION: A gas supplying apparatus 100 for plant cultivation comprises: a housing part 12 which houses a material performing absorption and release of carbon dioxide and water reversibly corresponding to each partial pressure； a gas introduction part 14 which introduces first gas containing carbon dioxide and water and second gas having lower partial pressure of carbon dioxide than that of the first gas in a switchable manner into the housing part 12； and a gas discharge part 16 which discharges third gas having concentration and relative humidity of carbon dioxide higher than those of the second gas during the introduction of the second gas from the gas introduction part 14.SELECTED DRAWING: Figure 1【課題】シンプルな装置構成で、植物の生育環境に適したガスを供給することが可能な植物栽培用のガス供給装置を提供すること。【解決手段】植物栽培用のガス供給装置１００は、二酸化炭素と水の吸収及び放出を、それぞれの分圧に応じて可逆的に行う材料を収容する収容部１２と、収容部１２に、二酸化炭素及び水を含む第１ガスと、第１ガスよりも二酸化炭素の分圧が低い第２ガスと、を切り替え可能に導入するガス導入部１４と、ガス導入部１４から第２ガスが導入されている間に、第２ガスよりも二酸化炭素の濃度及び相対湿度が高い第３ガスを排出するガス排出部１６と、を備える。【選択図】図１
