Abstract: A multicontact plug and socket is suggested which comprises a plug strip (2) with flat plug-in contacts (3) and a socket (1) with assigned flat contact receptacles (11) which are arranged in parallel chambers (8) of a contact carrier (5, 6, 7) and extend through assigned openings (10) of a safety plate (9) which is arranged so as to be displaceable in the contact carrier (5, 6, 7) in order to lock the contact receptacles (11). A catch tongue (15) of every contact receptacle (11) engages at the plate side (21) facing in the plug-in direction of the socket (1) in the unlocking position of the plate (9), while edge areas (20; 47, 48) of the opening (10) of the plate (9) contact portions of the edge (16) of the box-shaped portion (13) of the contact receptacles (11) with the plate side (21) in the locking position of the plate (9).