A contacting element (10, 40) for connecting a luminaire or an electrical unit to a mounting rail has a contact holding body (15, 41) with a plurality of connecting contacts (201, 202, 301, 302), said contact holding body being adjustable between an open position and a contacting position, wherein at least two connecting contacts (201, 202, 301, 302) are arranged adjustably on the contact holding body (15, 41), and wherein at least two of the adjustable connecting contacts (201, 202, 301, 302) are combined into a group and mounted on the contact holding body (15, 41) in such a way that they are only adjustable with respect to the contact holding body (15, 41) in a fixed relation to one another.