CLEANER

A cleaner, according to the present invention, comprises: a main body for separating dust from air suctioned in through an opening part; a suction motor provided to the main body and generating suction force; and a suction part coupled to the opening part and having a connection pipe for guiding the air to the main body. The main body comprises a suction guide coupled to one side of the connection pipe so as to guide the air suctioned in through the connection pipe to the inner circumferential surface of the main body. The connection pipe comprises a guide duct having a rotatable flap provided thereto. The suction guide is connected to the guide duct. A suction duct comprises: a first surface, which is a surface where the flap is installed; and a second surface facing the first surface. A second extension line of the second surface forms a first angle with a first extension line of one surface, of the suction guide, connected to the second surface. The first extension line and a third extension line of the flap form a second angle, wherein the second angle is equivalent to or smaller than the first angle.