An electrical connector for use with an electronic package, includes a base plate and a top housing. The base plate has a number of contacts with mating portions extending upward beyond a top surface of base plate. The top housing has a plurality of through holes corresponding to the contacts and receives the mating portions. The top housing defines a pair of channels to allow the electronic package moving relative to the top housing in a horizontal direction, and then the top housing with the electronic package move relative to the base plate in a vertical direction such that the mating portions protrude from a top surface of the top housing and contact with the electronic package.