The X-ray imaging device includes an irradiation unit which includes an X-ray tube and a collimator; and a tape measure which has a scale band on which distances from the irradiation unit are printed so as to increase from one end to the other and a winding mechanism that holds and winds the other end of the scale band. The irradiation unit has a scale band fixing portion which fixes one end of the scale band, and a winding mechanism fixing portion which fixes the winding mechanism.