The present invention relates to a breathing support device for use in the event of a disaster such as a fire in a building or the like. The breathing support device includes: a connection pipe having any length an induction pipe connected to one end of the connection pipe and a supply pipe connected to the other end of the connection pipe, wherein an opening provided in the bottom of the induction pipe is combined with a mesh having a plurality of apertures which is fixed by a fastening piece, and a cover plate is combined to an opening of the supply pipe such that the interior of the supply pipe is sealed by the cover plate and one or more intake/exhaust pipes are combined to the cover plate such that the intake/exhaust pipes communicate to the interior of the supply pipe.
