System of ejection of a turbofan

The present invention relates to an ejector system for a turbofan engine having at least one ejection nozzle (13; 17) with a trailing edge having an upper edge (13s; 17s), a lower edge (13i ; 17i), an inner lateral edge (13int, 17int) and an outer side edge (13ext; 17ext), the upper edge (13s, 17s) being upstream relative to the lower edge (13i; 17i). According to the invention the discharge system is characterized in that the outer lateral edge (13ext; 17ext) of the exhaust nozzle is also upstream of the inner lateral edge (13int, 17int) .This arrangement reduces the perceived noise in the aircraft cabin simultaneously with the perceived noise on the ground.