CONDENSATION TESTING DEVICE AND CONDENSATION TESTING METHOD

A dew formation testing device 10 has an adjustment tank 12 capable of adjusting the temperature and humidity of air to predetermined temperature and humidity, a testing tank 14 installed separately from the adjustment tank 12 and having a sample base 43 that has a mounting surface 43a, onto which a testing sample W can be placed, and that is capable to cool the mounting surface 43a, and ducts 17,18 that link the adjustment unit 12 and the testing tank 14. The testing tank 14 is provided with an air guide member 57 that, when air flowing into the testing tank 14 through the duct 17 flows onto the sample base 43 from a side of the sample base 43, guides the air in the direction tilted downward at a predetermined angle, the guidance being performed at a position right above the sample base 43 at an end thereof which is on the upstream side of the air flow.