A capsule (1) for inhalable pharmaceutical powder (2) having a body that is provided with an inner chamber (21) for containing the powder and with first and second (17, 15) openings to an outside environment, the body adapted for be displaced from a filling state, in which the first and second openings are put in fluid communication with each other through the inner chamber thus allowing the creation of an air flow through the body from the second (15) opening to the first opening that is capable of dragging an inhalable pharmaceutical powder into the outer environment in the inner chamber for filling it, to a sealed state in which the inner chamber is sealed from the outer environment to retain the dust contained in its interior, in which the body is a multi-part structure that has first and second parts (5, 3) that move relative to each other to bring the body to its filling and sealing states, in which the The first part is partially inserted into the first opening in the filling state, the first part having a plug section (34) that is in the first opening in the filling state, the stopper section having an outer surface (37) having a first and second outer surface portions, in which in the state of filling the first outer surface portion (37) is separated from the inner surface of the first opening and the second outer surface portion adjoins the surface inside the first opening, the first outer surface portion corresponding to one or more channels (37) on the outer surface of the plug section, said one or more channels comprising longitudinal grooves or grooves, and the grooves or grooves having a depth in the range of 0.005 mm - 0.01 mm, such that inhalable pharmaceutical powder particles occlude them, in which the The first part partially obstructs the first opening in the filling state to a degree that allows the flow of air through it, but which is occluded with the inhalable pharmaceutical powder entrained in the air flow.Una cápsula (1) para polvo (2) far
