A brace-type anti-snoring device includes a base and a flow-guide conduit. The base is placed within an oral cavity, palate teeth occlude an upper occlusal channel of the base, and mandible teeth occlude a lower occlusal channel of the base. Meanwhile, the flow-guide conduit is disposed outside the oral cavity. Thus, after the user has closed lips and swallowed saliva, a negative pressure difference is generated in the oral cavity and a tongue is sucked frontward and obstructs an air intake hole of the base concurrently to open the respiratory tract and fix the tongue and to achieve the objective of preventing snoring.
