EXHAUST DEVICE FOR INTERNAL COMBUSTION ENGINE

An exhaust muffler (22) includes a first muffler section (23) having a tubular member (24) made up of an inner pipe (25) to which an exhaust pipe (21) is connected and an outer pipe (26) covering the inner pipe (25), and a connector (28) connecting the tubular member (24) and a second muffler section (30) to each other, and the second muffler section (30) having an outer shell (32), a first partition wall (34), a second partition wall (35), and a third partition wall (36). Exhaust gases delivered from the exhaust pipe (21) are discharged from the first muffler section (23) and the second muffler section (30) out of the exhaust muffler (22). The second muffler section has a cross-sectional area larger than a cross-sectional area of the tubular member (24). The exhaust muffler (22) includes a first expansion chamber (45), a second expansion chamber (46), and a third expansion chamber (47). The second muffler section (30) includes a fluid communication pipe (37) extending through the first partition wall (34) and the second partition wall (35) for leading exhaust gases from the first expansion chamber into the second expansion chamber (46), and an exhaust passage pipe (31) held in fluid communication with the third expansion chamber (47) and extending through the second partition (35) and the third partition wall (36). The second partition wall (35) has a fluid communication hole (35d) defined therein that provides fluid communication between the second expansion chamber (46) and the third expansion chamber (47). There is thus provided an engine exhaust device capable of increasing a silencing capability by increasing the length of a route through which the exhaust gases flow while maintaining the length of the exhaust device.