Abstract: A hair trimming unit has a plastic housing 1 with a contact surface 2 for substantially flat coplanar sliding contact with a hirsute body area. A first blade 6 with a first elongate cutting edge 5 is mounted on a blade platform 4 formed on the housing so that the blade is forwardly inclined towards the contact surface and the blade edge 5 is at a set height above the contact surface. A connection member 10 is joined to the housing 1 where the member pivots about a pivot axis that is disposed at a point that is between about 10% and 70% of the trimming width as measured from the rear wall. A series of forwardly projecting elements 3 on the housing extend over the blade edge on the side of the contact surface and provide a comb structure for separating hair and guiding the hairs into contact with the exposed blade edge sections between the elements 3.