An exhaust device of an engine, with an exhaust path to lead exhaust gas discharged from the engine to outside, the exhaust device comprising: - an exhaust heat collector, comprising an exhaust heat collecting part being configured to collect heat from the exhaust gas flowing in the exhaust path, and a cooling part being configured to cool down the exhaust heat collecting part from an outer peripheral side via a cooling fluid; and - an exhaust gas flow controlling member in a cylindrical shape, comprising an inlet part which the exhaust gas flows into, and an outlet part where the inflow of the exhaust gas is discharged to an upstream side of the exhaust heat collecting part, wherein: - the exhaust gas flow controlling member is arranged so that an opening diameter of the outlet part thereof is arranged to be smaller than an outer diameter of the exhaust heat collecting part; - the exhaust gas flow controlling member is placed so that an open end of the outlet part opposes a central portion of an upstream end plane of the exhaust heat collecting part, and the open end of the outlet part and the upstream end plane of the exhaust heat collecting part are a predetermined distance apart; - the exhaust gas flow controlling member is arranged so that the opening diameter of the outlet part is smaller than the opening diameter of the inlet part, and placed so that an inner wall plane of the exhaust path and an outer peripheral plane of the outlet part are apart; and - the exhaust gas flow controlling member is provided so that an open end of the outlet part is placed in a downstream side of the upstream end of the cooling part of the exhaust heat collecting part. - an exhaust heat collector, comprising an exhaust heat collecting part being configured to collect heat from the exhaust gas flowing in the exhaust path, and a cooling part being configured to cool down the exhaust heat collecting part from an outer peripheral side via a cooling fluid; and - an exhaust gas flow controlling member in a cylindrical shape, comprising an inlet part which the exhaust gas flows into, and an outlet part where the inflow of the exhaust gas is discharged to an upstream side of the exhaust heat collecting part, - the exhaust gas flow controlling member is arranged so that an opening diameter of the outlet part thereof is arranged to be smaller than an outer diameter of the exhaust heat collecting part; - the exhaust gas flow controlling member is placed so that an open end of the outlet part opposes a central portion of an upstream end plane of the exhaust heat collecting part, and the open end of the outlet part and the upstream end plane of the exhaust heat collecting part are a predetermined distance apart; - the exhaust gas flow controlling member is arranged so that the opening diameter of the outlet part is smaller than the opening diameter of the inlet part, and placed so that an inner wall plane of the exhaust path and an outer peripheral plane of the outlet part are apart; and - the exhaust gas flow controlling member is provided so that an open end of the outlet part is placed in a downstream side of the upstream end of the cooling part of the exhaust heat collecting part.