To provide an environmental testing device capable of carrying out a stable compound environmental test all the time, without being affected by a temperature change in a thermostatic oven.

This environmental testing device 1 is provided with a sample receiving table 2 mounted with a sample, the thermostatic oven 3 for covering the receiving table, and capable of imparting a prescribed temperature environment to the sample mounted on the sample receiving table, a vibrating table 4 provided in outside of a box body, a vibration device 5 connected to a side part of the vibrating table and for exciting the vibrating table substantially horizontally, a connection member 7 provided penetrated through the box body and for connecting the sample receiving table and the vibrating table, and a pair of bearing parts 8, 9 arranged to sandwich the vibrating table from a substantially vertical direction, and for guiding the vibrating table substantially horizontally when vibrating a vibration device.