This connecter assembly (1000) comprises a male connecter (1) and a female connecter (2). The male connecter (1) comprises 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 to be connected, by pressing the connecters into each other, a plurality of claws (53) of the engagement member (5) of the male connecter (1) engage with a plurality of flange parts (211) of a main body (21) of the female connecter (2). When the connecters are to be separated from each other, by performing a first action where the lock member (4) of the male connecter (1) is pulled away the engagement member (5) and a second action where the lock member (4) is rotated, engagement of the claws (53) is released and separation becomes possible.
