The invention relates to motor vehicle vacuum pump (10), comprising a pump chamber (12), in which a pump rotor (13) rotates in a compressing manner, and an outlet chamber (18), into which the compressed gas escapes from the pump chamber (12). The vacuum pump (10) has a separating wall (16), which separates the pump chamber (12) from the outlet chamber (18), and at least one outlet valve (201, 202) in the separating wall (16), which is designed as a check valve and through which the compressed gas escapes from the pump chamber (12) into the outlet chamber (18). The outlet valve (201, 202) is formed by a valve opening (191, 192) in the separating wall (16), a valve seat (42), which is provided around the valve opening (191, 192), and a leaf spring (401, 402) as a valve body. The leaf spring (401, 402) is formed by a spring body (56) which comprises an attachment point (52) to which the spring body (56) on the separating wall (16) is fixed, and a stop (61) on the spring body side. The distance (A) between the spring-body sided stop (61) and the attachment point (52) is greater than a distance (B) between the attachment point (52) and an opening edge (65) of the valve opening (191, 192) which is adjacent thereto.