The present invention relates to a capacitive presence sensor (1) arranged in the gripping lever (L) of a handle of an openable body section (2) of a motor vehicle (V) characterised in that it comprises: a printed circuit (10) including a first surface (101) and a second surface (102), an electrode (E1) including a surface which extends along said first surface (101) and a second electrode (E2) including a surface which extends along said second surface (102); and also in that it comprises: a guard plane (13) made up of a conductive track arranged between the first electrode (E1) and the second electrode (E2), passing through the body (e) of said printed circuit (10) and comprising a first printed surface (130) extending along said first surface (101) of the printed circuit (10) and a second printed surface (131) extending along said second surface of the printed circuit (10).