A ground elastic strap for a compact flash card housing, for serving as a ground elastic strap of a connector inserted by a compact flash card, or inserted into a host housing, includes corresponding left and right elastic protruding pieces, so as to come into contact with a metal housing of a compact flash card when the compact flash card is inserted. The ground elastic strap is able to function as a ground structure for ground connection of the compact flash card, and to further prevent electro static discharge (ESD), thereby increasing stability of the compact flash card when transmitting data with a host connected.