Inhaler for dry powder having a substantially cylindrical body (310) that defines a dispersion chamber (311) said body (310) having on its cylindrical wall a mouthpiece (330) that defines a dispensing orifice (331) said body (310) being provided at its first axial end part with a knurled wheel (370) mounted rotatably on said body (310) said knurled wheel (370) having a loading aperture (371) for receiving a capsule (10) containing a dose of dry powder said body (310) being provided at its second axial end part with a stopper (360) mounted removably on said body (310) said body (310) having at least one opening profile (312 313) designed to open a capsule (10) which has been inserted into said loading aperture (371) when said knurled wheel (370) is moved in rotation with respect to said body (310).
