To issue a notification beforehand when moire arises in an image obtained by photographing.

In an imaging device, a live view image moire discrimination unit 118 discriminates whether the moire arises or not in a live view image. A high resolution image moire discrimination unit 120 has higher resolution than the live view image, and discriminates whether the moire arises or not in a high resolution image formed by high resolution image data having a resolution equal to that of recording image data which is image data for recording. When the live view image moire discrimination unit 118 discriminates that the moire arises in the live view image, and the high resolution moire discrimination unit 120 discriminates that the moire does not arise, a CPU 146 issues a notification to a photographing person to indicate that the moire does not arise in the recording image data.