A leak proof needleless medical connector characterized in that the leak proof needleless medical connector comprises a housing including an outer casing; and a valve tube disposed within the outer casing and having an inner surface; and a bottom annular blocking projection extending from a bottom end of the inner surface of the valve tube; an actuator being hollow, movably disposed within the outer casing of the housing and mounted around the valve tube of the housing; characterized in that it further comprises a resilient member disposed within the outer casing of the housing and including in sequence a lower compression tube being resiliently compressible and expansible and mounted around the valve tube of the housing; a column having at least one through hole defined therethrough; and an upper compression tube being resiliently compressible and expansible, and an interior of the upper compression tube communicating with an interior of the lower compression tube through the at least one through hole of the column; a bottom valve stem disposed in the lower compression tube and mounted in the valve tube of the housing, a gap formed between the bottom valve stem and the valve tube and not communicating with the interior of the upper compression tube, a bottom end of the bottom valve stem abutting the bottom annular blocking projection of the valve tube to close an open bottom of the valve tube; a top valve stem disposed in the upper compression tube; and an adapter being hollow and mounted on a top of the outer casing of the housing, the resilient member mounted between the adapter and the actuator, and an interior of the adapter not communicating with the at least one through hole of the column because of the top valve stem. a housing including an outer casing; and a valve tube disposed within the outer casing and having an inner surface; and a bottom annular blocking projection extending from a bottom end of the inner surface of the valve tube; an outer casing; and a valve tube disposed within the outer casing and having an inner surface; and a bottom annular blocking projection extending from a bottom end of the inner surface of the valve tube; an inner surface; and a bottom annular blocking projection extending from a bottom end of the inner surface of the valve tube; an actuator being hollow, movably disposed within the outer casing of the housing and mounted around the valve tube of the housing; characterized in that it further comprises a resilient member disposed within the outer casing of the housing and including in sequence a lower compression tube being resiliently compressible and expansible and mounted around the valve tube of the housing; a column having at least one through hole defined therethrough; and an upper compression tube being resiliently compressible and expansible, and an interior of the upper compression tube communicating with an interior of the lower compression tube through the at least one through hole of the column; a lower compression tube being resiliently compressible and expansible and mounted around the valve tube of the housing; a column having at least one through hole defined therethrough; and an upper compression tube being resiliently compressible and expansible, and an interior of the upper compression tube communicating with an interior of the lower compression tube through the at least one through hole of the column; a bottom valve stem disposed in the lower compression tube and mounted in the valve tube of the housing, a gap formed between the bottom valve stem and the valve tube and not communicating with the interior of the upper compression tube, a bottom end of the bottom valve stem abutting the bottom annular blocking projection of the valve tube to close an open bottom of the valve tube; a top valve stem disposed in the upper compression tube; and an adapter being hollow and mounted on a top of the outer casing of the housing, the resilient member mounted between the adapter and the actuator, and an interior of the adapter not communicating with the at least one through hole of the column because of the top valve stem.