1. A medical image reproducing apparatus for reproducing image information recorded as an image file, wherein: the image file is output from a medical instrument capable of switching between observed images of a subject and feature images different from the observed images for display, the image file is recorded to include: motion image information of the observed images, timing information indicating a history of display timing of switching between the observed images and the feature images different from the observed images for display in execution of observing the subject by the medical instrument, and image processing condition information for generating and displaying the feature images different from the observed images, the medical image reproducing apparatus comprising: an information extractor which extracts the motion image information, the timing information, and the image processing condition information from the image file; an image generator which generates the feature images by highlighting specific features contained in the observed images by using the extracted motion image information and the extracted image processing condition information; a display which displays input images; and an image switch controller which switches the display images output to the display to either the recorded image information or the feature images, the image controller having a function of performing the switching in synchronization with the timing information, wherein the output displayed images are configured to be reproduced as same motion images and same feature images as images observed during the execution of observing the subject by the medical instrument by switching image processing conditions indicated in the image processing condition information in accordance with the timing information, and wherein the feature images are images in which spectroscopic intensity in a visible short-wavelength band of 400 nm to 420 nm is made higher than spectroscopic intensity in any other visible wavelength band.