A storage device includes a supporting frame, a storage unit, a partitioning component, and a connecting belt. The supporting frame includes a hanger and is formed with an engaging hole. The storage unit is coupled detachably to the supporting frame, and includes a bottom wall and a surrounding wall cooperating with the bottom wall to define a storage space. The partitioning component is disposed in the storage unit for dividing the storage space into at least two compartments. The connecting belt is for connecting the partitioning component to the supporting frame.