Abstract: An inhaler for inhalation of an inhalable dry powder is provided. The inhaler has (a) an outer shell having a first shell part and a second shell part; (b) a capsule holder having a chamber for holding a capsule, a capsule breaker for breaking open a capsule held within the chamber and a trigger for causing the capsule breaker to break open a capsule; (c) a support for supporting the capsule holder; and (d) an outlet for passage of dry powder from the capsule into a user. The capsule holder is positioned in the first shell part which has an aperture through which the trigger protrudes. The aperture has a cut-out in the rim of the first shell part and through which the trigger may pass when the capsule holder is removed from the first shell part.