The invention discloses an electronic card connector for inserting one of both a first card and a second card. The electronic card connector includes an insulating body, a shielding case for forming an accommodating cavity with the insulating body, and a tray for accommodating electronic cards; wherein the tray is provided with a card accommodating space which extends along the front and the back of the card inserting direction, and two sides of the card accommodating space along the card inserting direction are provided with concave parts which are perpendicular to the width direction of the inserting direction; the concave parts form a width increasing part opposite to the card accommodating space, the tray is provided with supporting plates which extend along the front and the back of the card inserting direction, the supporting plates pass through the card accommodating space and a transverse space, and the supporting plates cannot reach the edges of the concave parts to allow the bottom of the edges of the concave parts to be hollow. The tray with a small area on plate and a low height can effectively accommodate different types of the electronic cards, so that the requirements of consumers for different cards can be flexibly met.