A breathing protector to be fitted in a tracheostoma is provided. The breathing protector comprises a filter housing (100, 200, 300) with a central axis, a distal end, a proximal end, a first opening (101, 201, 301), and a second opening (102, 202, 302), wherein said second opening (102, 202, 302) is located in a proximal end of said filter housing (100, 200, 300), and said first opening (101, 201, 301) is located distally of said second opening (102, 202, 302), such that said first opening (101, 201, 301) is located upstream said second opening (102, 202, 302) during inhalation. The breathing protector further comprises a heat-moisture exchanging filter (103, 203, 303) received in said filter housing (100, 200, 300), wherein said heat-moisture exchanging filter (103, 203, 303) is resilient a valve seat (105, 205, 305) around said first opening (101, 201, 301) a rail, located circumferentially of said valve seat (105, 205, 305), extending axially and distally from said first opening (101, 201, 301), said rail having at least one aperture (108, 208, 308) in the side wall thereof a valve member (109, 209, 309), arranged in a transversal plane to the central axis, adapted to closingly engage with the valve seat (105, 205, 305) in a closed position, said valve member (109, 209, 309) being reciprocatingly arranged within said rail (106, 206, 306) between the closed position and an open position and a return spring pressing the valve member (109, 209, 309) axially and distally into the open position, wherein the heat-moisture exchanging filter (103, 203) is the return spring.Linvention concerne un dispositif protecteur de respiration à installer lors dune trachéotomie. Le dispositif protecteur de respiration comprend un boîtier de filtre (100, 200, 300) avec un axe central, une extrémité distale, une extrémité proximale, une première ouverture (101, 201, 301), et une deuxième ouverture (102, 202, 302). La deuxième ouverture (102, 202, 302) est située dans une extrémité pr
