An electrical connector including a housing (11) provided thereon with an opening (12) through which a flat circuit device (13) is inserted into the housing (11), a plurality of conductive contacts (14) arranged on the housing (11), and a holding member (16;17) attached to the housing (11) to be operative to hold the flat circuit device (13) inserted in the housing (11) and then to release the flat circuit device (13) from holding by the holding member (16;17), wherein the holding member (16;17) has a base portion (21;31) fixed to the housing (11) and a movable arm portion (22;34) extending from the base portion (21;31), and the movable arm portion (22;34) is provided thereon with an engaging portion (27;36) operative to be put in engagement with the flat circuit device (13) inserted in the housing (11) so as to hold the same and a releasing portion (28;37) protruding from the movable arm portion (22;34) to the outside of the housing (11) and is operative to move for releasing the engaging portion (27;36) from the engagement with the flat circuit device (13) when the releasing portion (28;27) is manipulated to be shifted in position.