To provide an imaging device capable of obtaining a parameter for reducing a mounting error of an apparatus in the imaging device.

The imaging device includes: a coordinates confirming part 26 for acquiring the coordinates value of a position, where an object to be imaged is imaged, from an image which is obtained by imaging the object to be imaged and imaged by setting the imaging element at a predetermined position, and acquiring the coordinates value of a position, where the object to be imaged is imaged, from an image which is obtained by imaging the object to be imaged and imaged by setting the imaging element at a position moved from the predetermined position; and a correction amount calculating part 27 for using the respective coordinates values and movement distances of the imaging element to calculate a constant of a formula for correcting a mounting error of an apparatus.