A variable nozzle unit includes a first plate, a second plate, a plurality of nozzle vanes each having a rotary shaft portion and a vane, a plurality of vane arms, and a unison ring. Each vane arm includes an engaging portion. The plurality of vane arms includes at least one extension arm. The extension arm includes an extension portion that has a shape extending from the engaging portion toward the second plate. The second plate has a receiving portion that receives the extension portion. The receiving portion includes a pair of contact walls, wherein the contact walls are brought into contact with the extension portion respectively at a position where each of the nozzle vanes maximizes the flow passage area of the exhaust air passage and at a position where the nozzle vane minimizes the flow passage area of the exhaust air passage.