Vacuum cleaner

The invention provides a vacuum cleaner, wherein the vacuum cleaner uses leak valve which restrains negative pressure of dispersion and chattering from an electric blower side and operate stably. The vacuum cleaner may surely cool the electric blower when sectional areas of air path decrease sharply or air path is blocked. The vacuum cleaner 1 includes: a valve casing 36, having an atmosphere guiding inlet 35 introducing atmosphere to inlet side of the electric blower 8; a valve seat 37, setting on the peripheral section of the atmosphere guiding inlet 35 of the valve casing 36; a valve body 38, disposed in the valve casing 36; a coiled spring 39, press the valve body 38 against the valve seat 37; a full-closed preventing section 41, setting on at least one surface of surfaces which the valve body 38 opposite to the valve seat 37, to prevent the atmosphere guiding inlet 35 from fully closing and guiding air to the valve casing 36.