A mouth and nose mask including a main cover body with a main air vent at the center thereof, an inner cover body, and a linking member. There is a space between the main cover body and the inner cover body. The linking member links the main cover body and the inner cover body. The bottom edge of the inner cover body is designed not to touch the face when wearing. The mouth and nose mask is safe, can be used in the treatment of allergic respiratory diseases, and is effective in preventing the same.
