A bio-information presenting method and a bio-information presenting device, for presenting to a user bio-information, indicating a movement of a physical organ of the user. The movement of a bodily organ of the user, controlled voluntarily or involuntarily, is fed back to the user, and a background image is stored in a storage unit for subsequent image data for composition. An image processing unit compounds an image of the user, captured by a camera, with a background image. In compounding the images, the image of the user is subjected to fade-in and fade-out in association with an output of a breathing sensor. The user is apprized of the inhalation period, exhalation period and the depth of breathing, based on an image on a display unit. The change in the display image surface represents certain changes in the user's breathing. The display unit of the breathing visualizing device is changed responsive to the breathing of the user, and a feedback loop is formed in this manner between the breathing visualizing device and the respiratory organ of the user.