To provide a detection device capable of improving efficiency of fault analysis, to provide a method of controlling the detection device, and to provide an imaging apparatus.

The detection device includes: an acceleration detecting means 30 for detecting acceleration in respective directions of three axes of X, Y and Z; a drop detecting means 31 for detecting whether it is in a dropped state on the basis of the acceleration and calculating a drop direction; and a drop information recording means 24 for recording drop information including the drop direction, when dropping is detected.