The colour of each material was different, but the artificial skin made of red colour with the added 5% softener showed the appropriate flexibility. The strength of the rubber band on the fingers of the prosthetic hand is applied differently, in order, from the thumb to the small finger. According to the test result, the strength decided middle finger was the most appropriate. If the strength is too strong, the speed of spreading the hand is too fast and the force is too strong thus there has a problem when it is grabbed a particular object.