A dry-powder inhaler (100; 200) having: a body (110; 210) forming a dispersion chamber (111; 211); a dispenser orifice (131; 231) through which the user inhales; a loading opening (121; 220) that receives a capsule (10) containing a dose of dry powder for inhaling; and capsule opening mechanism (140; 265) for opening a capsule inserted into said loading opening and emptying the dose of powder into said dispersion chamber. The body (110; 210), at least at one wall of said dispersion chamber, is made of a tinted transparent material that is adapted to filter UV rays, at least in part, and to make it possible to see the inside of the dispersion chamber while masking, at least in part, residues of powder that are stuck to the at least one wall of tinted transparent material.