To provide a suitcase equipped with low-friction slide endless treads eliminating the problem of a conventional suitcase with casters having effectiveness only on a flat floor and capable of being easily carried even on steps.

The suitcase (7) comprises endless tread guide cases (4) and (9) so as to travel round the outer periphery and the two parallel guide cases (4) and (9). An upper part and both sides of the suitcase (7) are shaped into the form of the guide case (9) and a lower part is shaped into the form of the guide case (4). Low-friction resin plates (1) are applied onto inner sides of the guide cases (4) and (9). Circular and endless treads (3) provided with the low-friction resin plates (1) applied onto frictional faces are set onto the guide cases (4) and (9).