Adjustable anti-snoring device

An adjustable anti-snoring device, comprising:

• two side pieces;
• an upper curved structure, wherein two ends of the upper curved structure are respectively connected to the two side pieces;
• two connectors, wherein one end of each of the two connectors is connected to one of the two side pieces, and each of the two connectors comprises:
• two blocks;
• two guiding rods movably inserted into the two blocks and parallel to each other;
• and
• an adjusting screw between the two guiding rods and parallel to the two guiding rods, wherein the adjusting screw is movably inserted into the two blocks;
• and
• a lower curved structure comprising a recess so as to accommodate a lower dental arch of a user, wherein the lower curved structure is disposed below the upper curved structure, one end of the lower curved structure is connected to the other end of one of the two connectors, and the other end of the lower curved structure is connected to the other end of the other of the two connectors;
• wherein an extending distance is existed between the two blocks by rotating the adjusting screw, the extending distance is 0.25 mm to 9.00 mm, an extending direction of the extending distance is parallel to an axial direction of the adjusting screw, and the extending direction is parallel to a sliding direction of a temporomandibular joint of the user.