Abstract: A diving mask supplemented with a device for facilitating the equalization of pressure across the eardrum of a user, including (a) a mask body configured to closely fit the face of the user so as to cover at least the eyes and nose of the user, so that, when in use, the mask body and the face of the user define a first closed space, the mask body including a transparent window through which the user sees; (b) first and second ear cups for closely covering the ears of the user, the ear cups and the sides of the head of the user define a second and third closed spaces around the ears of the user, respectively, each of the ear cups including (i) a flexible ear cover for covering an ear of the user; (ii) an external solid frame for supporting the ear cover; and (iii) a solid outer cover for protecting the ear cover; (c) first and second tubes extending from the mask body, each of the first and second tubes having a first end and a second end, the first ends communicating with the first closed space defined by the