Abstract: An animal test device for performing a behavior test of a test animal and which can automatically perform optimization of the test includes a cage configuring a living environment of the test animal; a chamber removably attached to the cage; a touch panel provided in the chamber, presenting a problem to the test animal, detecting a response of the test animal, and obtaining response data; a position measurement device that measures a position of the test animal in the cage and the chamber and obtains position data; a data storage unit that stores the response data and the position data as test data; and a problem improvement unit that improves the problem presented by the touch panel, based on the test data.