To provide an apparatus, method and program for evaluating a stable state of a plurality of structures in a structural body constituted by stacking the plurality of structures.

Acceleration response information showing acceleration response when a striking force is applied by an impulse hammer 16 to an evaluating object structure 50 as an evaluating object of the stable state of the plurality of structures in the structural body constituted by stacking the plurality of structures is acquired by an accelerometer 14. A PC 12 derives at least one of maximum acceleration amplitude value as the maximum value of the acceleration amplitude shown by the acquired acceleration response information and average frequency as the average value of the frequency per second of the acceleration response shown by the acceleration response information, compares at least one of the derived maximum acceleration amplitude value and the average frequency with a predetermined threshold, determines the stable state of the evaluating object structure 50 based on the comparison result, and displays the determination result with a display.