An electrical connector assembly comprising a first connector and a second connector mated with each other. The first connector includes a first shell forming a first mating surface thereon. A retractable first contact has a first contacting section moveable between an outer position coplanar with the first mating surface and an inner position recessed from the first mating surface. The second connector includes a second shell forming a second mating surface thereon. A stationary second contact has a second contacting section protruding beyond the second mating surface. During mating, the second contacting section abuts against the first contacting section in the mating direction and protrudes beyond the first mating surface to be snugly received within the first connector.