A mask device includes a mask body including a front cover to form an outer appearance of the mask body, a frame coupled to the front cover, the frame located in front of a user's nose and mouth when the mask device is worn by the user, and a flow path between the front cover and the frame. A first air cleaner is disposed on one side of the mask body and a second air cleaner is disposed on another side of the mask body, and a first fixing part couples the first air cleaner to the mask body and a second fixing part couples the second air cleaner to the mask body. The first air cleaner is movable with respect to the first fixing part to move towards the frame and the second air cleaner is movable with respect to the second fixing part to move towards the frame.