Disclosed is an inhaler for administering a medicament in the form of inhalable substances, substance formulations, or substance mixtures, especially in the form of a powder as depicted in exemplary FIG. 1. Said inhaler comprises a housing (1) which is provided with an interior (18) for accommodating at least one capsule that is filled with the medicament. The housing (1) is coupled to a mouthpiece (5) while an actuator (12) encompassing at least one needle (13) is mounted so as to be movable towards the housing in order to open the capsule. The mouthpiece (5) is effectively connected to the actuator (12) in such a way that the needle (13) of the actuator (12) does not extend into the interior (18) for puncturing the capsule in an operational position of the mouthpiece (5).
