The present invention relates to an air inlet for a nacelle of a jet engine with a front fan, comprising an upper part (115S), a lower part (115I), an inner lateral part (115int) and an outer lateral part (ext), defining a leading edge (115) between an external wall (111) of the nacelle and an internal wall (113) forming the air supply channel of the jet engine. According to the invention, the air inlet is characterized in that the leading edge of the outer lateral part (115ext) is to the rear with respect to the leading edge of the inner lateral part (115int).Preferably, the leading edge of the upper part (115S) is likewise to the rear with respect to the leading edge of the lower part (115I).