The present invention relates to a detachable connector (1) for a junction block comprising: an insulating body (2), a connection terminal (10) having a housing (8) for an electrically conductive wire (C) intended to be inserted through a first opening (3) of the insulating body (2) along an insertion direction (D) of the electrically conductive wire (C) in the insulating body (2), a connection plug (20) comprising a socket (21) from which extend two elastic connection branches (22a, 22b) intended to ensure an electrical contact with a complementary plug of the junction block intended to pass through a second opening (4) of the insulating body (2), the detachable connector (1) being characterized in that it comprises a passageway (6) for the electrically conductive wire (C) connecting the first housing (8) of the connection terminal (10) and a second housing (9) formed in the socket (21) of the connection plug (20).