An air vent for a motor vehicle passenger compartment comprising: - a case extending along a longitudinal direction and having at least one outlet opening through which an air flow circulates, - air guide means (11, 12) capable of orienting the air flow in at least one outlet direction (D1-D6), the air guide means (11, 12) comprising a plurality of first air guide elements movably mounted in rotation on the case about horizontal pivotal axes (Ya) and capable of orienting the air flow in an outlet direction among at least three different outlet directions (D1-D3), namely a horizontal outlet direction, an upwardly inclined outlet direction, and a downwardly inclined outlet direction, and a plurality of second air guide elements movably mounted in rotation on the case about vertical pivotal axes (Za) and capable of orienting the air flow in an outlet direction among at least three different outlet directions (D4-D6), namely an outlet direction oriented centrally, parallel to the longitudinal direction, an outlet direction inclined to the left with respect to the longitudinal direction, an outlet direction inclined to the right with respect to the longitudinal direction, and this, for each of the positions of the first air guide elements, - displacement means capable of moving the air guide means (11, 12), wherein the displacement means comprise a maneuvering member rotatably movable about a vertical axis under the action of a motor, said maneuvering member being capable of acting simultaneously on the first air guide elements via transmission means (5, 6) so as to induce a series of displacements of said first air guide elements and on the second air guide elements so as to induce a series of displacements of said second air guide elements, and said maneuvering member has a cylindrical shape and is provided, along its external cylindrical periphery, with a first guide groove, characterized in that the transmission means (5, 6) comprise a first lever pivotally connected to the case about a central pivot axis aligned in the longitudinal direction, said first lever comprising two arms (54, 55) disposed on either side of the pivot axis, respectively a left arm and a right arm, and a second lever pivotally connected to the case about a transverse axis at a rear end, said second lever being provided, at a front end, with a first oblong opening intended to slidably receive a horizontal rod secured to one of the first air guide elements and, at a central portion, with a second oblong opening intended to slidably receive a free end of the right arm of the first lever, and in that said first guide groove is intended to slidably receive a free end of the left arm of the first lever, said first guide groove being configured to cause a vertical displacement of said free end of the left arm during rotation of the maneuvering member. - a case extending along a longitudinal direction and having at least one outlet opening through which an air flow circulates, - air guide means (11, 12) capable of orienting the air flow in at least one outlet direction (D1-D6), the air guide means (11, 12) comprising a plurality of first air guide elements movably mounted in rotation on the case about horizontal pivotal axes (Ya) and capable of orienting the air flow in an outlet direction among at least three different outlet directions (D1-D3), namely a horizontal outlet direction, an upwardly inclined outlet direction, and a downwardly inclined outlet direction, and a plurality of second air guide elements movably mounted in rotation on the case about vertical pivotal axes (Za) and capable of orienting the air flow in an outlet direction among at least three different outlet directions (D4-D6), namely an outlet direction oriented centrally, parallel to the longitudinal direction, an outlet direction inclined to the left with respect to the longitudinal direction, an outlet direction inclined to the right with respect to the longitudinal direction, and this, for each of the positions of the first air guide elements, - displacement means capable of moving the air guide means (11, 12),