Abstract: An invention relating to a dust mask is disclosed. The disclosed invention is characterized in that ear bands are slidably coupled to a mask main body by coupling members ultrasonic-welded to the mask main body. According to the present invention, provided is the effect of enabling stable maintenance of closeness of the mask to the face of a wearer while enabling the wearer to easily and conveniently select the level of closeness of the mask that matches the preference of the wearer by allowing adjustment of the state of ear bands as necessary.