A respiratory filter holder adapter for an aquatic full face mask having at least one longitudinal tube which comprises: at least one first end adapted to fit over at least one housing, coupling means, aquatic full face mask; and at least one radial locking means having at least one radial clamping system arranged at the base of the first end in axial direction on the outer wall of said longitudinal tube; and at least one reduction means having at least one clamping slot which originates at the base of the first end of the longitudinal tube and which extends in axial direction under the radial clamping system, the length of said clamping slot is slightly greater than the radial clamping area of said radial clamping system, thus said clamping slot enables the reduction of the section of said longitudinal tube, under the clamping action (S1, S2) of said radial clamping system thus allowing the blocking of the longitudinal tube on the housing of the coupling means, of the aquatic integral face mask to be adapted; and at least one radial sealing means located at the first end in the inner wall in the axial direction of the longitudinal tube and arranged slightly upstream of the radial clamping area of said clamping system radial seal, said radial sealing means having at least one radial circular groove and at least one radial circular seal housed in said radial circular groove; and at least one second end comprising at least means of the connections which are externally accessible and which on the other hand are adapted to allow the connection of a plurality of accessories; and at least one storage compartment capable of storing respiratory filter materials and arranged at least at the upper central portion of the longitudinal tube and which is externally accessible, t, the longitudinal tube has a longitudinal recess, which comprises an area of through perforations located in the base of said longitudinal recess, said through-hole area communicating with the inner communication chamber located at the lower central portion of said longitudinal tube, said inner communication chamber, allowing the flow of filtered air to the inspired air intake channel located in the first end of said longitudinal tube of said adapter, threads are machined into blind holes previously drilled vertically in locations centered laterally and longitudinally at both outer ends of said longitudinal obvious in addition to said compartment further comprises at least one removable and reversible lid, which allows the closure of said storage compartment, said cover has through perforations on a portion of its area as well as a plurality of at least means of fasteners and at least sealing means at least one first end adapted to fit over at least one housing, coupling means, aquatic full face mask; and at least one radial locking means having at least one radial clamping system arranged at the base of the first end in axial direction on the outer wall of said longitudinal tube; and at least one reduction means having at least one clamping slot which originates at the base of the first end of the longitudinal tube and which extends in axial direction under the radial clamping system, the length of said clamping slot is slightly greater than the radial clamping area of said radial clamping system, thus said clamping slot enables the reduction of the section of said longitudinal tube, under the clamping action (S1, S2) of said radial clamping system thus allowing the blocking of the longitudinal tube on the housing of the coupling means, of the aquatic integral face mask to be adapted; and at least one radial sealing means located at the first end in the inner wall in the axial direction of the longitudinal tube and arranged slightly upstream of the radial clamping area of said clamping system radial seal, said radial sealing means having at least one radial circular groove and at least one radial circular seal housed in said radial circular groove; and at least one second end comprising at least means of the connections which are externally accessible and which on the other hand are adapted to allow the connection of a plurality of accessories; and at least one storage compartment capable of storing respiratory filter materials and arranged at least at the upper central portion of the longitudinal tube and which is externally accessible, t, the longitudinal tube has a longitudinal recess, which comprises an area of through perforations located in the base of said longitudinal recess, said through-hole area communicating with the inner communication chamber located at the lower central portion of said longitudinal tube, said inner communication chamber, allowing the flow of filtered air to the inspired air intake channel located in the first end of said longitudinal tube of said adapter, threads are machined into blind holes previously drilled vertically in locations centered laterally and longitudinally at both outer ends of said longitudinal obvious in addition to said compartment further comprises at least one removable and reversible lid, which allows the closure of said storage compartment, said cover has through perforations on a portion of its area as well as a plurality of at least means of fasteners and at least sealing means