This invention aims to temporarily lock and smoothly couple and detach a lever type connector. After a hood 13 is opposed to a fitting portion 12a, the hood 13 is inserted into the fitting portion 12a, so that a lock portion 29 is clamped between an upper engaging projection 23 and a lower engaging projection 22. Then, a female connector housing 12 is temporarily locked in a male connector housing 11. At this time, a cam follower boss 20 is inserted into a cam groove 17 in an actuating lever 16 and both the housings 11 and 12 are coupled by turning the lever 16. In order to detach the housings from a coupled position, the lever 16 is turned from the coupled position to a detached position. Even if the female connector housing 12 is extracted from a right side area in the case that an extraction resistance at a left side area is larger than that at the right side area, the housing 12 abuts on the lower engaging projection 22b at the right area, thereby correcting an inclined posture. Thus, since the female connector housing 12 is always properly arranged in the male connector housing 11, it is possible to smoothly couple and detach the housings.