A clamping and contacting device for mounting and electrically contacting thin silicon rods in silicon deposition reactors is disclosed, the clamping and contacting device having a rod holder for receiving one end of a thin silicon rod. The rod holder comprises at least three contact elements disposed around a receiving space for the thin silicon rod. Each of the contact elements forms a contact surface facing towards a receiving space for electrically and mechanically contacts the thin silicon rod, wherein the contact surfaces of adjacent contact elements are spaced apart.