Exhaust device of engine

An exhaust device of an engine, comprising:

• an exhaust port formed in a cylinder head and connected to an exhaust aperture of a cylinder at a first open end;
• an exhaust manifold disposed on a side surface of the cylinder head and formed with a first exhaust passage connected to a second open end of the exhaust port opposite from the first open end;
• an exhaust path constituting part disposed on a side of the exhaust manifold opposite from the cylinder head, and formed with a second exhaust passage connected to a downstream end of the first exhaust passage;
• an exhaust gas purifying catalyst device disposed on a downstream side of the exhaust path constituting part;
• an upstream gasket disposed between the side surface of the cylinder head and an upstream connecting member of the exhaust manifold;
• and
• a downstream gasket disposed between a downstream connecting member of the exhaust manifold and an exhaust-manifold-side connecting member of the exhaust path constituting part, the upstream gasket having a larger thermal resistance in an exhaust gas flow direction than the downstream gasket.