PURPOSE: A fire door assembly is provided to achieve a more reliable noise-proof and wind-proof effect in use and to facilitate the construction of thereof. CONSTITUTION: The fire door assembly comprises: a fire door(110) consisting of facing front and rear surfaces(112a,112b) and two side surfaces connecting both distal ends of the front and rear surfaces; a frame(120) having first and second protrusions, each of protrusions having facing first and second surfaces(122a,122b) at each side surface of the fire door and third and fourth surfaces(122c,122d) protruded vertically from the first and second surfaces to face a part of the front surface of the fire door; a first packing(150a) attached onto the first surface of the frame; a second packing(150b) attached onto the fourth surface of the frame; and at least one hinge for coupling the fire door toward the first surface of the frame.
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