ENVIRONMENT TESTING DEVICE

PROBLEM TO BE SOLVED: To reduce fluctuations in environmental conditions with respect to samples.SOLUTION: An environment testing device 1 includes: a partitioning wall 15 in which an air exhaust hole 41 and an air intake hole 42 are formed; a test chamber 10 and an air conditioning chamber 11 which are separated from each other by the partitioning wall 15; an exhaust duct 21; and a guide duct 22 that guides air from the air exhaust hole 41 to the exhaust duct 21. The exhaust duct 21 and the guide duct 22 constitute, out of six or more wall faces demarcating the test chamber 10, wall faces adjacent to each other except the partitioning wall 15. Further, the exhaust duct 21 has an air exhaust hole 21a that discharges air in a direction orthogonal to the direction in which samples are arrayed.