A female connector 20 includes a female housing 21 and a front retainer 50 movable with respect to the male housing in a connecting direction between a partial locking position for allowing resilient deformation of a locking lances 35 of the female housing 21 and a full locking position for suppressing the resilient deformation of the locking lance 35. The female housing 21 includes a stopper portion 42 resiliently deformable in a direction extending in the connecting direction. A male connector 60 includes a contact portion 69 extending in the connecting direction. The front retainer 50 includes a stopper releasing portion 55.