An electrical connector assembly for connecting a CPU with an FPC includes a first electrical connector having a first insulating housing and a plurality of first contacts retained in the first insulating housing, a second electrical connector electrically connecting the first electrical connector in a vertical direction having a second insulating housing and a plurality of second contacts retained in the second insulating housing, and a protecting cover assembled between the first electrical connector and the second electrical connector. The protecting cover includes a base and a plurality of through holes running through the base for receiving the second contacts to contact with the first contacts. The protecting cover includes a pair of buckling portions for locking the FPC and an acting portion extending upwardly from the buckling portion, the acting portion release the buckling portion off the FPC when a hand push the acting portion.