PROBLEM TO BE SOLVED: To provide a greenhouse heat-insulating device that can stably keep a greenhouse at constant temperature in a simple structure.SOLUTION: This invention provides a greenhouse heat-insulating device 90 for heat insulation in a greenhouse. The greenhouse contains a duct 7 which includes a fan 91 and circulates the air in the greenhouse, and the duct 7 contains a heat storage body 92 filled with a latent heat type heat storage agent.【課題】簡単な構成で温室を安定して恒温化可能な温室保温装置を提供する。【解決手段】温室内を保温する温室保温装置９０において、温室内に、ファン９１を有し温室内の空気を循環させるダクト７を設け、ダクト７内に潜熱型の蓄熱剤を充填した蓄熱体９２を配置する構成とした。【選択図】図３
