The present disclosure relates to a high voltage power cable joint device comprising: an elongated conductive connector (15) having a first end face and a second end face opposite to the first end face, a field control body having a first semiconducting layer arranged circumferentially around the entire connector (15), and extending beyond the first end face and the second end face, wherein the first end face is provided with a first bore section (23) and the second end face is provided with a second bore section, which first bore section (23) and second bore section extend parallel with and are arranged offset from the central axis of the connector (15). The connector (15) has an outer surface (28) that has a first outer portion where the connector wall is generally the thinnest towards the first bore section (23) and a second outer portion where the connector wall is generally thinnest towards the second bore section (25). Furthermore, the connector has a straight first through-opening (27) which extends fr
