A connector includes female terminals (10), a female terminal holder (20), male terminals (32) and a male terminal holder (40). The female terminal holder (20) includes a female terminal holding portion (50), and the female terminal holding portion (50) defines cavities (55) that open out in a direction perpendicular to a terminal fitting direction and includes female terminal locks (56, 57) configured to prevent separation of the female terminals (10) by contacting the female terminals (10) in the respective cavities (55) from behind. The male terminal holder (40) includes a male terminal holding portion (41) and a female terminal restraining portion (44) to be fit to the female terminal holding portion (50) to restrain the respective female terminals (10) from an outer side.