To prevent a coloring rod such as a colored pencil or pastel from flowing out on opening of a lid and improve its storing efficiency.

Two storage cases 10, 20 are connected by a foldable connector piece 40, the storage cases are formed into a structure in which they are opened or closed to each other, they are constituted such that a storing volume of each of the cases having the same size as seen in their top plan view can be set two times and each of the storage cases includes an inner cover 50 opened or closed, and when the cases are opened, the coloring rods stored in the storage cases are prevented from being broken apart and flowing out.