Abstract: Juice extractor, is disclosed, for crushing fruits or leaves, or root of green vegetable for extracting green juice, wherein, considering the incomplete juice extraction of the related art juice extractor, the present invention is provided with thread end portions and vacant portions at a rear portion of a screw for enhancing a crushing effect, and a fore end portion with reduced diameter at a fore end thereof, to which fore end a juice extracting member having detachable extracting net member and mounting member is coupled for secondary extraction, that improves a juice extraction efficiency, whereby further improving a pressing effect of the raw material for extracting juice, which provides a better yield, allowing an easy removal of remnants accumulated inside of the juice extracting components, to maintain the extractor clean, reducing a ratio of elasticity degradation caused by a prolonged use, and using in making noodle, as an alternative use.