<；P>；PROBLEM TO BE SOLVED: To provide an agricultural greenhouse structured so as to irradiate a farm field with ultraviolet to enable pollinating insects to accurately recognize a direction to fly so as to effectively make pollination to farm crops by the pollinating insects. <；P>；SOLUTION: The agricultural greenhouse 1, structured so as to cover a farm field 3 where pollinating insects 2 are diffused, includes: a covering film 4 forming a farm field space and having light transmittance； and a light distribution control members 5 transmitting only light almost orthogonal to the covering film 4 through the covering film 4 and distributing the light into the farm field 3. The light distribution control member 5 is structured so that a direction almost orthogonal to the covering film 4 may include at least two directions toward the space of the farm field 3. By such a structure, the deflecting condition of the ultraviolet irradiating the farm field 3 is maintained in the vicinity of the transmission through the covering film 4 to attain light distribution equal to a light deflection pattern in an airy region in the farm field 3, and thereby the pollinating insects 2 make accurate recognition of the direction so as to exactly fly toward farm crops 31 or nest boxes 32 placed in the farm field 3. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
