An electrical connector that holds a circuit card in place includes a latching arm for engaging the side edge of the circuit card for maintaining the latter in a mounted position in the connector. The electrical connector permits the latching arm to be formed thinner and thereby permits downsizing of the overall electrical connector. The electrical connector includes a housing formed with a card-receiving slot for accommodating an edge of a circuit card, and a plurality of terminals provided in parallel to each other within the card-receiving slot for establishing electrical communication with a conductive pattern at the edge portion of the circuit card. A latching arm is integrally formed with the housing and is outwardly deflectable. The latching arm is adapted to engage with the side edge of the circuit card which is accommodated within the card-receiving slot, and a metallic reinforcing channel is provided in association with and extending along the latching arm for restricting deflection and twisting of the latching arm.