The present invention relates to a shelf and a refrigerator, and more particularly, to a shelf height re-setting structure which enables convenient setting of a shelf without removing food from the shelf, and a refrigerator having the same. For this, the present invention provides a shelf height re-setting structure including a rail having height adjusting paths repeated in a vertical direction each with a slope and release and setting paths connected between adjacent height adjusting paths, and setting means secured to the shelf so as to be movable along the height adjusting paths and release and setting paths for selecting a height of the shelf, and a refrigerator with the same.