1. An apparatus capable of detecting hands of a subject in real time, the apparatus comprising: a first image input part configured to generate a first image photographed at a first side with respect to one subject; a second image input part configured to generate a second image photographed at second side with respect to the subject; a stereoscopic processor configured to generate a distance image indicating 3-dimensional distance information by comparison information of the first image and the second image; a skin region detector configured to determine whether each pixel within any one of the first and second images is a skin pixel and generate a skin image indicating whether each pixel within any one of the first and second images is a skin pixel; a skin/distance pixel combiner configured to generate a combined image by combining the distance image with the skin image in units of pixels; a background and noise eliminator configured to generate an effective image including two or more hand candidate regions by eliminating background and noise from the combined image; and a hand correlation determiner configured to determine calculating effective values with respect to respective pairs of the hand candidate regions which can be combined within the effective image and determine a pair of hand candidate regions having the largest effective values as hand regions.