<p>Provided are: a first connector housing (10); a second connector housing (20); a lever (30); a main circuit switch (SW1) that is off in a first operating position of the lever (30) and on in a connector joining operating position and a second operating position; a signal circuit switch (SW2) that is off in the first operating position and connector joining operating position of the lever (30) and on in the second operating position; a first lock part (LK1) that locks the second operating position of the lever (30); a second lock part (LK2) that locks the contact joining operating position of the lever (30); and a lock release operating part (27) that can release the locked state of the second lock part (LK2) by the operation thereof.</p>
