a connector housing which has a pair of side walls, wherein slots are formed in the side walls respectively and extend upwardly from the lower side of the side walls;

a plurality of terminals which are accommodated in the connector housing; and

a pair of metal fixing members, each of which includes a board fixing portion mounted to a board and a housing mounting portion disposed in an upstanding condition relative to the board fixing portion,

wherein the housing mounting portion of each of the metal fixing members is inserted into the slot of each of the side walls from the lower side thereof to fix the metal fixing members to the connector housing;

wherein the slot of each of the side walls has an upper portion and a lower portion which serves as an inlet, the lower portion being smaller in width than the upper portion, and the slot of each of the side walls having a pair of retaining step portions formed at a width-changed portion thereof;

wherein the housing mounting portion of each of the metal fixing members has a pair of arms at a tipping end thereof so as to have a slit therebetween;

wherein hooks projecting outwardly are formed on upper end portions of the arms so that a dimension between outer edges of the arms is greater than the width of the lower portion of the slot, and when the housing mounting portion is inserted into the slot, the hooks are engaged respectively with the retaining step portions; and

wherein a convex portion is formed on an inner wall of the slot so as to prevent the arms from being resiliently deformed inwardly after the housing mounting portion is inserted into the slot.