1. An endoscope apparatus, comprising: optical systems which form images for a left-eye and a right-eye respectively; at least one image pickup element which captures the two images and generates pictorial images for the left eye and the right eye; and an image processing unit which carries out processing of a pictorial image signal from the image pickup element and creates a stereoscopic image that can be displayed on a monitor, wherein the endoscope apparatus satisfies the following conditional expression (1) 
 0.3< CP ×(1+ Dt 1)<7, and CP≦ 10   (1) where, CP denotes a distance (mm) from a surface nearest to object of the optical system up to an object, when an amount of left and right shift of the left-eye pictorial image and the right-eye pictorial image becomes 0, at a center of a monitor screen, and Dt 1 denotes a distortion in length at the maximum image height.