A rear side connection terminal arranged along the back end edge of a housing is provided with a base part in which at least a portion is embedded in a bottom wall part of the housing, a contact arm part in a cantilever shape in which a tip end extends slanted upwards towards a front end of the housing, a contact part that is connected to a tip end of the contact arm part and that contacts with a terminal member of the card, and a contact arm support part that includes a curved part that projects rearward with a bottom side front end coupled to a back end of the base part and a top side front end coupled to a back end of the contact arm part.