To provide a connector inexpensive, hard to break, and firmly and easily connecting connection members to each other without causing problems of lead and metal allergy.

The synthetic resin connector 1 comprises an approximately C-shaped connection ring 6 in plan view. In the upper face at one end of the connection ring 6, a fitting groove 7 is formed which has one end opened from the end face of the connection ring 6. At the other end of the connecting ring 6, a fitted portion 8 is formed which is removably fitted into the fitting groove 7 through its upper side. The fitted portion 8 is located lower than the fitting groove 7.