The connecter assembly (1000) of the present invention includes a male connecter (1) and a female connecter (2). The male connecter (1) includes a connecter main body (3), a lock member (4), and an engagement member (5). When the male connecter (1) and the female connecter (2) are connected to each other, by pressing the connecters into each other, a plurality of claw portions (53) of the engagement member (5) of the male connecter (1) is engaged with a plurality of flange portions (211) of a main body (21) of the female connecter (2). When the connecter are to be separated from each other, by performing a first operation of pulling away the lock member (4) of the male connecter (1) from the engagement member (5), and a second operation of rotating the lock member (4), engagement of the claw portions (53) is released and the separation is possible.
