A quick connector, comprising: a connector body configured to allow a plug-in member to be inserted therein along an axial direction of the connector body, the connector body comprising an indication part on an outside thereof; a locking member mounted to the connector body, the locking member comprising a locking leg for locking the plug-in member to the connector body, the locking leg being configured to automatically move from an unlocking position to a locking position due to mechanical interference with the plug-in member during an insertion of the plug-in member into the connector body, a movement of the locking leg from the unlocking position to the locking position comprising an axial movement along an insertion direction of the plug-in member and a transverse movement toward the locking position along a transverse direction of the connector body; and a shielding sleeve adapted to be sleeved outside the connector body; wherein the shielding sleeve is configured to be actuated by the locking leg and moved relative to the connector body during the axial movement and the transverse movement of the locking leg; wherein the shielding sleeve is in an initial position when the locking leg is in the unlocking position, and the shielding sleeve is in an indication position when the locking leg is in the locking position; wherein the shielding sleeve is configured to at least partially shield the indication part and render the indication part unidentifiable when not reaching the indication position, and to expose the indication part to an identifiable degree when reaching the indication position. a connector body configured to allow a plug-in member to be inserted therein along an axial direction of the connector body, the connector body comprising an indication part on an outside thereof; a locking member mounted to the connector body, the locking member comprising a locking leg for locking the plug-in member to the connector body, the locking leg being configured to automatically move from an unlocking position to a locking position due to mechanical interference with the plug-in member during an insertion of the plug-in member into the connector body, a movement of the locking leg from the unlocking position to the locking position comprising an axial movement along an insertion direction of the plug-in member and a transverse movement toward the locking position along a transverse direction of the connector body; and a shielding sleeve adapted to be sleeved outside the connector body; wherein the shielding sleeve is configured to be actuated by the locking leg and moved relative to the connector body during the axial movement and the transverse movement of the locking leg; wherein the shielding sleeve is in an initial position when the locking leg is in the unlocking position, and the shielding sleeve is in an indication position when the locking leg is in the locking position; wherein the shielding sleeve is configured to at least partially shield the indication part and render the indication part unidentifiable when not reaching the indication position, and to expose the indication part to an identifiable degree when reaching the indication position.