To provide a tube connector that does not require insertion of a core pipe into the inside of a tip of a tube when connecting the tube.

The tube connector comprises a connector body having a connection hole for connecting a tube, a seal ring which is attached to an inner peripheral surface of the connection hole of the connector body and seals an outer peripheral surface of the tube inserted in the connection hole, and engaging means for engaging the outer peripheral surface of the tube. A core pipe, which is provided in the connection hole of the connector body and fits inside of the tip of the tube when inserted into the connection hole of the tube, is fixed to the connector body.