An inspecting method for an electrophoretic display device includes applying first signals into all pixel regions in a display region of the electrophoretic display device to inspect defects on an image; applying second signals into a first part of the pixel regions and maintaining the first signals at second and third parts of the pixel regions; and applying third signals into the first part of the pixel regions and fourth signals at the second part of the pixel regions and maintaining the first signals at to the third part of the pixel regions.