An electrical connector includes: an insulating body; multiple terminals respectively accommodated in the insulating body; a cover covering the insulating body in a front-rear sliding manner and having a hollow portion to accommodate a mating plug including a substrate and multiple conducting portions; and a driving member. Each terminal has a contact portion. The hollow portion has a virtual center line extending in a left-right direction. The cover ihas a pulling portion located in front of the virtual center line to abut the substrate forward. The driving member has a driving portion located in front of the hollow portion. After the substrate is mounted downward into the hollow portion, the driving portion drives the cover to move horizontally forward relative to the insulating body, and the pulling portion pulls the substrate forward, such that the conducting portions move forward to be in contact with the contact portions of the terminals.