A card connector, comprising an insulative housing having a base, a plurality of passageways extending along a widthwise direction of the base, a plurality of retention slots defined on two lengthwise sides of each passageway, and a plurality of contacts received in the respective passageways. Each contact has a planar soldering section on a side of the planar section; a beam section extending from the side of the planar section opposite to the soldering section; the beam section defining an arc contact section on a free end; the planar section having a number of retention pieces received in the retention slots. The retention pieces are defined perpendicular to an extending direction of the soldering section.