FIELD : medicine.SUBSTANCE : invention refers to medical equipment, namely to a dry powder inhaler. Device comprises a body forming a chamber, a strip of blisters containing blisters. Blisters comprise a dose of a medicament for inhalation by a user. Each blister comprises a blister lid attached to the blister cavity. Strip of blisters is located inside the chamber. Inhaler comprises a drive element and a step-by-step movement system for sequential movement of each blister into the blister opening position in response to movement of the drive element. Device has a mouthpiece through which a dose of the drug is inhaled by the user, and a device for opening the blister. Device for opening a blister comprises a support element of the blister to support one of said blisters and a blister flexion element interacting with the supporting element of the blister. Blister flexion element and the blister supporting element are configured to move relative to each other between a first position allowing movement of said blister into or onto the support element of the blister, and a second opening position in which the blister flexion element has already performed a joint action with the support member of the blister. Movement from the first position to the second position leads to bending each of the two spaced apart portions of said blister relative to the rest of the blister along the corresponding fold line and to the support member of the blister to form two spaced apart holes, from which each hole extends along circumference of blister cavity, with beginning and ending in points located on fold line so that when user inhales through mouthpiece, through blister through two holes air flow is formed for entrainment of dose, contained in the blister, and its transfer from the blister and through the mouthpiece into the user' s airways.EFFECT : facilitation of fast and unobstructed output of the powder from the blister, which improves accuracy of the dose emitted by the inhaler.15 cl, 12 dwg