To easily connect a pipe member to a pipe connector without cutting the pipe member, to improve the productivity and to reduce the cost.

The pipe connector 10 has a first pipe part 11 having an insertion hole 14 and a second pipe part 12 provided with a pipe component 5 and having a communication hole 15 communicated with the insertion hole 14. The pipe member 1 has a refrigerant supply hole 2 communicated with the communication hole 15 formed on the second pipe part 12, and is axially inserted into the insertion hole 14 of the pipe connector 10. Further the first pipe part 11 of the pipe connector 10 has a pair of O-ring grooves 16 at both sides through the communication hole 15 of the second pipe part 12, and the leakage of the refrigerant to the external is prevented by mounting O-rings 17, 17 on the O-ring grooves 16, 16.