The objective of this paper is confirming the possibility of real application of the distance measured by a Microsoft’s Kinect and analyzing the accuracy of the measured distance. For an object that its distance from the Kinect is known, depth information of the object is measured for experiment at first. The depth information is converted to a depth image using lower 8 bits of the depth information. Several depth images are acquired for placing the object at regular intervals. A linear equation is obtained using th depth images. Error is analyzed by comparing and analyzing the two linear equations: one is the linear equation derived from actual distance information and the other is the linear equation from distance taken by Kinect. Finally, the actual distance of a mannequin face is estimated after the depth information is acquired. Experimental results show that the actual distance of 20 cm is expressed in a range from 0 to 200. It is found that the distance error for the nose end in a manikin face at a distance of 87cm was 0.0006%.