1. A three-dimensional image display device for displaying a three-dimensional image enabling depth perception and produced from a plurality of images acquired by imaging a subject from different viewpoints, the three-dimensional image display device comprising: a timer unit for setting and measuring a given time over which a pop-out amount of the three-dimensional image changes; a pop-out amount change mode memory in which information on a time-dependent change of the pop-out amount occurring over the given time is previously stored; a pop-out amount controller for producing the pop-out amount for each unit time based on a parallax between the plurality of images, the given time, and the time-dependent change information; a changing image producer for producing a given number of pairs of pop-out amount changing images including the pairs of pop-out amount changing images which have a parallax according to a pop-out amount for each unit time from the plurality of images according to a pop-out amount by the unit time; a three-dimensional image producer for producing a corresponding pop-out amount changing three-dimensional image from the given number of pairs of pop-out amount changing images; an effect controller for applying an effect of enhanced display to the corresponding pop-out amount changing three-dimensional image when the pop-out amount has reached or exceeded a third predetermined level; and a display controller for displaying the corresponding pop-out amount changing three-dimensional image or the corresponding pop-out amount changing three-dimensional image to which the effect has been applied on a monitor based on the given time measured by the timer unit and the unit time, wherein the effect controller is adapted to cause an area around the subject where the pop-out amount has reached or exceeded the third predetermined level to light.