An image suitable to training of mental control is automatically displayed in accordance with change in physical state of an examinee. The training assisting apparatus according to the present invention is a training assisting apparatus for assisting an examinee's mental control by displaying a training image, including: a display section that displays the training image; an image change quantity storage section that stores a change quantity of an information quantity of the training image displayed by the display section, in association with a physical state of the examinee; a physical state acquiring section that acquires the physical state of the examinee looking at the training image displayed by the display section; an image change quantity extraction section that extracts the change quantity of the information quantity of the training image stored in the image change quantity storage section in association with the physical state of the examinee acquired by the physical state acquiring section; and an image change control section that changes the information quantity of the training image displayed by the display section, in accordance with the change quantity of the information quantity of the training image extracted by the image change quantity extraction section.