Patent ID: 8025123

Claim:
A muffler structure for a vehicle comprising: an upper shell that has a plurality of outer walls formed in such a manner as to be open to a downward side in a vertical direction of a vehicle body and having a longitudinal axis in a gas flow direction; and a lower shell that has a plurality of outer walls formed in such a manner as to be open to an upward side in the vertical direction of the vehicle body and having a longitudinal axis in the gas flow direction, wherein the upper shell and the lower shell are directly joined at respective peripheral edge portions and a portion between the plurality of outer walls, to thereby form a plurality of isolation chambers which are arranged in parallel to a direction that crosses the gas flow direction, the plurality of isolation chambers communicating through a communicating portion that is provided at a joint position partitioning the plurality of isolation chambers, and the isolation chambers are formed as a columnar space having a longitudinal axis parallel to the gas flow direction.