To provide shoes whose heel parts can be opened for solving the problem that inside of conventional shoes sometimes gets humid to be uncomfortable when keeping wearing of them for a long period during going out, the shoes are half taken off and the heel parts of the shoes are stepped for relaxing, so that the heel part is damaged.

Each of the shoes whose heel parts can be opened has a structure where a shoe body (1) and a heel component (2) can be engaged and disengaged by each engaging member. In the case of walking, the heel component (2) is mounted to the heel part of the shoe body (1), and the shoe is used like the conventional shoe with the heel. When relax state is desired during going out, the heel component (2) can easily be attached and detached for wearing like a shoes whose heel part is opened like sandals. In addition, a function of attaching and detaching the heel component (2) becoming unnecessary when opening the heel parts to the insteps of the original shoe bodies (1) is provided, so that the heel component (2) can be stored at the instep part of the shoe body (1) for preventing losing without requiring a separate storing implement such as a bag.