A safety device for escaping from building, which includes a flexible tube-shaped object (8), interval installing elastic apparatus (6) longitudinal along the flexible tube-shaped object (8), a supporting frame (9) installed on the top of said flexible tube-shaped object (8), escaping entry (11) installed on the supporting frame (9). Using the safety device according to the present invention, people can safely descend onto the ground from the high building through said flexible tube-shaped object (8), when the accident occurs in the building.