Exhaust device

An exhaust device that purifies exhaust gas discharged from an engine through an exhaust pipe, the exhaust device comprising:

• a chamber that forms an expansion chamber of the exhaust gas at a downstream side of the exhaust pipe;
• a partition wall that partitions the expansion chamber into a first expansion chamber and a second expansion chamber;
• an introduction pipe that enters the second expansion chamber from a downstream end of the exhaust pipe;
• and
• a catalyst interposed at an intermediate portion of the introduction pipe in the second expansion chamber,
• wherein the partition wall is formed with a first opening connecting an outlet of the introduction pipe to the first expansion chamber and a second opening connecting the first expansion chamber to the second expansion chamber, and the second opening overlaps with the catalyst when viewed from a side of the first expansion chamber,
• wherein the partition wall extends in a vehicle front-rear direction, and
• wherein, in a plan view, a center line of the catalyst is parallel to the partition wall.