The invention relates to a contact device for connecting multi-wire lines in a moist or wet environment. The device comprises first and second housing portions (14,38), each portion including a plurality of contacts (20,42). It is the underlying objective to provide electrical connection between these contacts (20,42) without moisture or conducting fluid bridging over these contacts. This object is obtained by the provision of a pad (48) at the second housing portion (38) which pad (48) encloses the contacts (42) of said second housing portion (38) and comprises an elastic, electrically insulating and water-imprevious material, and the contacts (42) extend into said pad (48) to such an extent that they pierce it when pressure is applied.