The purpose of the present invention is to reduce the density at which a plurality of nozzles are arranged as well as to minimize the equipment cost for the nozzles. This agricultural greenhouse (30) is provided with an outer shell (20), a plurality of nozzles (11), and an air flow forming device (15). The nozzles (11) are arranged on the basis of the density of mist that would be generated therefrom and then reach the ground so that the ground is divided into a plurality of first areas (A1) in which the density is equal to or greater than a first reference value and a plurality of second areas (A2) in which the density is equal to or smaller than a second reference value that is smaller than the first reference value. Additionally, the nozzles (11) are arranged so that each of the second areas (A2) is adjacent to at least one of the first areas (A1) among the plurality of first areas (A1). The air flow forming device (15) is configured to form an air flow that moves cool air generated by the vaporization of the mist that has reached the first areas (A1) to the spaces above the respective second areas (A2).本發明於配置複數之噴嘴之情形下，可降低噴嘴的配置密度，且抑制噴嘴所須之設備費用。農業用屋舍（30）具備外殻（20）、複數之噴嘴（11）、氣流形成裝置（15）。複數之噴嘴（11）配置成：基於自各者產生後抵達至地面之水霧的密度，而將地面劃分成密度係第一基準値以上的複數之第一區域（A1）、及密度係比第一基準値更小之第二基準値以下的複數之第二區域（A2）。再者，噴嘴（11）配置成使複數之第二區域（A2）各者係與複數之第一區域（A1）中之至少一個第一區域（A1）相鄰。氣流形成裝置（15）構成為產生氣流，該氣流使「利用抵達第一區域（A1）之水霧汽化而產生之冷空氣」移動至複數之第二區域（A2）各者的上方空間。
