To provide a connector for simplifying the administration work of a doctor or care giver in nutrition administration through a gastrostomy catheter.

The connector is a connecting member for connecting a mouth member of a pouch container and a medical catheter to each other, and has one end side with a catheter side mounting portion connected to the medical catheter, and the other end side with a pouch side mounting portion connected to the mouth portion of the pouch container. A side of the pouch side mounting portion is formed with an opening, the connecting member is slid to the mouth member, and the opening is switched between a closed state by the mouth member, and an exposed state. Accordingly, the connector serves as a cap of the pouch container, the trouble to change a cap for a connector is eliminated, and nutrition administration is facilitated.