An electronic card connector, cooperated with a plug-in component and defining an insertion direction and a transverse direction perpendicular to the insertion direction, includes an insulative housing, a number of contacts retained in the insulative housing, a metal shell attached to the insulative housing and forming a cavity therebetween, and an ejector movable in the insulative housing. The metal shell has a number of lateral walls located at two sides and a front end thereof. One of the lateral walls has a resisting portion protruding to the cavity and resists the resisting portion to confine a movement thereof in a horizontal plane.