Abstract: A pipe connector including a connector body having a passage; a plurality of flexible pieces; a locking cap; a first stopping member; and a second stopping member. The plurality of flexible pieces is circumferentially disposed at one end of the passage. One end of each of the flexible pieces is fixedly connected to the connector body. The locking cap includes a first end close to the connector body and a second end opposite to the first end. A conical surface is formed on the internal wall of the second end. The conical surface coordinates with the external wall of the flexible pieces to lock the pipe. The first stopping member is disposed on the external wall of the connector body or the flexible pieces; and the second stopping member is disposed on the internal wall of the first end of the locking cap and coordinates with the first stopping member.