The present invention relates to an inhaler device for delivering a dose of medicament in dry powder form from a container to a patient in need thereof. The inhaler comprises first and second airflow paths (80, 85) which are arranged such that during inhalation, a capsule (40) having a longitudinal axis and first and second end sections (90, 95) delimiting the capsule on opposing ends located in a capsule chamber (30) of the inhaler device performs an oscillating movement in the capsule chamber parallel to its longitudinal axis between first and second sidewall portions (60, 65) of the capsule chamber.
