A housing main body of a plug housing includes an inserted part inserted in a receptacle housing and an exposed part exposed outside the receptacle housing, in a state where the plug housing is fitted to the receptacle housing. The exposed part includes a hook part formed at an end of the exposed part in an intersecting axis intersecting with an insertion direction of inserting the inserted part in the receptacle housing, the hook part being configured to hook a finger thereon, and a contact part contactable with another plug housing between the hook part and the inserted part when the other plug housing is disposed adjacent to the plug housing in the intersecting axis.