An electrical connector comprises: a housing provided with a locking portion; a locking lever, which has a first arm and a second arm connected to opposite sides of the housing, and a beam portion extending between the first arm and the second arm, with a channel being provided in the beam portion; and a connector position assurance member, the connector position assurance member having a locking edge, the connector position assurance member being inserted into the channel from an open end of the channel, and the connector position assurance member having a pre-installed position and a locked position in the channel, wherein when the locking lever pivots to the second position and the connector position assurance member enters into the locked position, the locking edge abuts against the locking portion in the channel, thereby locking a rotational motion of the locking lever.