A circuit board device for fixing an electronic card, which is formed with at least one aperture, includes a circuit board and a securing member. The circuit board includes a board body formed with two through holes, and a socket connector provided on the board body for mating with the electronic card. The securing member includes a pressing plate for pressing against the electronic card, at least one engaging stud projecting from a bottom end of the pressing plate for engaging the aperture, and two resilient engaging arms provided respectively on left and right sides of the pressing plate. The engaging arms extend respectively through the through holes and engage releasably the board body.