The present invention relates to a mask for blocking fine dust using an air curtain, and the mask for blocking fine dust using an air curtain according to the present invention includes: a mask unit covering a part of the face including the respirator; a body part supplying external air to the mask part; and a sending unit for transferring the external air from the main body to the mask, wherein the mask unit includes: a purification supply line for supplying the transferred external air to the respirator; an air curtain forming line for discharging the outside air to the outside of the mask unit to form an air curtain; and an outdoor air flow rate control member for controlling the flow rate of outdoor air transferred to the purification supply line or the air curtain composition line.
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