An inhaler for preparations in powder form, includes a first body (2), which is provided with an inhaling channel (3), and a second body (4), which is provided with at least one reservoir (6), which is open toward the outside and is preset to contain at least one dose of preparation in powder form. The first body (2) is associated with the second body (4) and can move with respect to the second body (4) between a first position, at which it closes the reservoir (6), and a second position, at which at least one connection is open between the reservoir (6) and the inhaling channel (3), making the dose of preparation in powder form available for inhaling.
