This sensitivity measuring device is provided with: a stage for placing a sample container； a temperature adjustment device that is provided with an upper heating body and a lower heating body, which are disposed above and below the sample container； and an image pickup device for picking up an image of the sample container, said image pickup device being provided with a lighting apparatus and an image pickup apparatus. Each of the upper heating body and the lower heating body has a structure wherein the temperature of a first region, a peripheral portion, is higher than the temperature of a second region including a center portion.
