A respiratory tract bore opening keeping device includes generally a main body that has two sides each connected to a resilient plate. The resilient plates each have a distal end that is remote from the main body and includes a protruding section having an increased thickness formed thereon. The main body has an outer side on which an upper lip positioning section and a lower lip positioning section are formed. The main body has an inner side on which an upper tooth positioning section and a lower tooth positioning section are formed in such a way that the lower tooth positioning section is in front of the upper tooth positioning section. The keeping device is depositeable in the mouth of a person with lips and teeth respectively positioned on the lip and teeth positioning sections to change the configuration of the tongue and the location of the lower jaw.
