1. An image display apparatus that displays a biological state image showing the state of autonomic nerves based on detected biological information, the apparatus comprising: a display section that displays an image; an information acquisition section that acquires predominance level of sympathetic nerve and parasympathetic nerve and an activity magnitude of the autonomic nerve based on the biological information; an image generation section that generates the biological state image in which a figure having a size according to the acquired activity magnitude of the autonomic nerves is set along a first axis, along one side of which the predominance level of the sympathetic nerve is set with respect to a reference point and along the other side of which the predominance level of the parasympathetic nerve is set with respect to the reference point, in a position according to the acquired predominance levels of the sympathetic nerve and the parasympathetic nerve and a display control section that causes the display section to display the generated biological state image.