A dynamic image processing apparatus processes image data of a medical dynamic image that includes a plurality of frame images obtained from successively imaging a subject and that shows a dynamic state of the subject. The dynamic image processing apparatus includes a hardware processor. The hardware processor enhances resolution of at least one or more of the plurality of frame images included in the medical dynamic image to a high resolution and generates a secondary medical image. The hardware processor executes a recording process in which a record is kept to show that the secondary medical image is generated secondarily from the existing medical dynamic image.