A cabinet includes a housing, two first rails, two pairs of pivoting elements, and two second rails. The housing includes two doors pivotably mounted to opposite sides of a front end of the housing. The first rails are respectively fixed to opposite internal sides of the housing. First ends of a pair of pivoting elements are pivotably connected to an inner side of each of the doors, and second ends of the pair of pivoting elements of each of the doors are pivotably connected a corresponding one of the second rails. When the doors are opened parallel to the first rails, the second rails are operable to move relative to the corresponding doors and aligned with the corresponding first rails to form two extended sliding rails.