PROBLEM TO BE SOLVED: To provide a highly heat-insulative agricultural greenhouse that positively utilizes solar heat.SOLUTION: An agricultural greenhouse 20 comprises an outer shell, heat preserving members 10, and driving members (rollers 11 or the like). In the outer shell, a frame supports a light permeable covering body. The heat preserving members 10 are arranged in an internal space of the outer shell, and a first state in which the members are in gathered in a specified place and a second state in which the members are spread from the specified place are selectable. The driving members 11,12,13,15,16 drive the heat preserving members 10 such that the heat preserving members 10 are deformed between the first state and the second state. Further, the heat preserving members 10 have heat storage capability. The driving members drive the heat preserving members 10 such that the heat preserving members 10 select the first state predetermined time zone in the evening. The specified place is a region deviated in a direction to which sunlight is made incident with respect to the center of the outer shell in a predetermined time zone.SELECTED DRAWING: Figure 2【課題】太陽熱を積極的に利用した保温性の高い農業用ハウスを提供する。【解決手段】農業用ハウス２０は、外殻と保温部材１０と駆動部材（ロール１１など）とを備える。外殻は、光透過性の被覆体をフレームが支持する。保温部材１０は、外殻の内部空間に配置され、特定場所にまとめた第１状態と特定場所から広げた第２状態とが選択可能である。駆動部材１１，１２，１３，１５，１６は、保温部材１０が第１状態と第２状態との間で変形するように保温部材１０を駆動する。また、保温部材１０は、蓄熱性を有している。駆動部材は、夕方の所定の時間帯に保温部材１０が第１状態を選択するように保温部材１０を駆動する。特定場所は、外殻の中心に対して所定の時間帯に太陽光が入射する方向に偏った領域である。【選択図】図２
