Bodyboard having a heat engine, performing the function of towing the user through the water, and comprising: - a hull providing buoyancy, said hull o being a bodyboard or boogieboard, or any marine hull, o remaining partially above the surface in the travelling phase o having a small size, such that it does not provide sufficient buoyancy to allow an adult user a travelling position standing thereon and that it does not float with an adult user lying thereon being out of the water o having an acceleration control o having hand-holds, situated on the upper side of the hull, - and a propulsion unit o situated underneath the hull or in the hull o containing a heat engine situated at least partially below the waterline of the bodyboard having a heat engine and supplied with air via a snorkel, o containing an electric starter, a propeller/tube system, and an exhaust pipe capable of discharging the combustion gases and having an outlet below the surface of the water o the exhaust pipe being equipped with a water non-return system, preventing water reaching the engine via the exhaust pipe, when the engine is stopped, characterised in that the water non-return system comprises an electric micro air pump, opposing said reaching of water. - a hull providing buoyancy, said hull o being a bodyboard or boogieboard, or any marine hull, o remaining partially above the surface in the travelling phase o having a small size, such that it does not provide sufficient buoyancy to allow an adult user a travelling position standing thereon and that it does not float with an adult user lying thereon being out of the water o having an acceleration control o having hand-holds, situated on the upper side of the hull, o being a bodyboard or boogieboard, or any marine hull, o remaining partially above the surface in the travelling phase o having a small size, such that it does not provide sufficient buoyancy to allow an adult user a travelling position standing thereon and that it does not float with an adult user lying thereon being out of the water o having an acceleration control o having hand-holds, situated on the upper side of the hull, - and a propulsion unit o situated underneath the hull or in the hull o containing a heat engine situated at least partially below the waterline of the bodyboard having a heat engine and supplied with air via a snorkel, o containing an electric starter, a propeller/tube system, and an exhaust pipe capable of discharging the combustion gases and having an outlet below the surface of the water o the exhaust pipe being equipped with a water non-return system, preventing water reaching the engine via the exhaust pipe, when the engine is stopped, characterised in that the water non-return system comprises an electric micro air pump, opposing said reaching of water. o situated underneath the hull or in the hull o containing a heat engine situated at least partially below the waterline of the bodyboard having a heat engine and supplied with air via a snorkel, o containing an electric starter, a propeller/tube system, and an exhaust pipe capable of discharging the combustion gases and having an outlet below the surface of the water o the exhaust pipe being equipped with a water non-return system, preventing water reaching the engine via the exhaust pipe, when the engine is stopped,