A fiber optic connector assembly of the type for positioning fiber optic connectors relative to light-emitting and light-sensing members comprises a receptacle mountable onto a printed circuit board and in which the light-emitting and light-sensing members are disposed. A housing in which fiber optic connectors terminated onto fiber optic transmission members are mounted in a spring-biased condition and is latchably connected to the receptacle. The fiber optic connectors are disposed on the housing a connector-carrying member is latchably secured in the housing placing the fiber optic connectors under spring tension thereby forming a fiber optic plug which is disposed in the receptacle and latched thereto with the fiber optic connectors positioned adjacent the light-emitting and light-sensing members.