A latching device (10) for a card edge connector (30) and auxiliary board (60) having a first arm (12) and a second arm (14), wherein the second arm includes a latching unit (20) and a latching release unit (26), when the latching device (10) is inserted into a receptacle compartment (46) in the connector (30), the first arm (12) is biased toward the second arm for fixing the latching device (10) in the receptacle compartment. The latching unit (20) includes round shoulders (22, 24) which are provided to fit into round recesses (62) of an auxiliary board (60). A directed pressure (A, B, C) placed on the release unit (26) causes the latching unit (20) to rotate away from an area in card edge connector (30) where an auxiliary board is disposed.