1. A stereoscopic display device, comprising: a parallax adjustment section performing a parallax adjustment on each of a left-eye image and a right-eye image which are inputted; and a display section displaying the left-eye image and the right-eye image which are resultant of the parallax adjustment by the parallax adjustment section, wherein the parallax adjustment section performs the parallax adjustment only on a region other than an OSD image region with an OSD image superposed therein in each of the left-eye image and the right-eye image.