The invention relates to a connection device for a supply line with a jacket pipe and at least two inner lines arranged therein, wherein a housing with a first connection region for the jacket pipe and a second connection region for the inner lines is provided. According to the invention the first connection region comprises at least one holding element which is mounted, for the purpose of holding or releasing the jacket pipe, so that it can be radially fed thereto or returned therefrom. The second connection region is arranged axially spaced apart from the first connection region and comprises axially actuated plug connection elements for the inner lines.