A connector position assurance member (60) includes a body (61), a resiliently displaceable lock (70) projecting forward from a front of the body (61) and a push-in suppressing member (80) projecting rearward from a rear of the body (61). The housing (30) includes a receptacle (31) and a lock arm (40) provided on an upper surface of the receptacle (31). The lock arm (40) includes a locking portion (44) to be locked to a projection (102) of a mating housing (100) and a connection releasing portion (45) for displacing the locking portion (44) by being pushed toward an outer peripheral surface of the receptacle (31). With the connector position assurance member (60) at a connection assurance position (CAP), the lock (70) is locked to the locking portion (44) and the push-in suppressing member (80) is between the upper surface of the receptacle (31) and the connection releasing portion (45).