Connector

A connector comprising constituent connectors combined vertically with each other, each constituent connector including an upper wall, a lower wall, a pair of side walls having upper and lower ends, a front face, a rear face, and a plurality of terminal accommodating chambers extending between the front and rear faces and for accommodating terminals, comprising:

• an arm-shaped rib projecting downwardly from the lower ends of both side walls of each constituent connector except a lowermost connector;
• a claw projecting inwardly from a lower end of the rib;
• and
• a locking portion, for locking the claw, formed on both side walls of each constituent connector, in which:
• the claw of the rib of an upper connector is locked by the locking portion of a lower connector so as to fix the upper connector and the lower connector to each other, wherein when the upper and lower connectors are fixed together, an outer surface of the rib projecting downwardly from the respective sidewall of the upper connector is flush with the sidewall of the lower connector, such that the side wall of the fixed upper and lower connectors present a generally smooth surface.