To provide a binding device for bottle containers which has a simple structure and securely binds the necks and bodies of a plurality of bottle containers by a simple operation.

The binding device includes a base 101 having an upper surface for placing a plurality of bottles with their necks upward. The upper surface of the base 101 is provided with a first guide member 103A for positioning the first bottle container 1A to a binding position, and pulling means for pulling the body of the second bottle container 1B toward the body of the first bottle container 1A. The pulling means is configured such that while a first cord member B1 are set into a loop shape around the necks of the first and second bottle containers 1A and 1B placed on the upper surface of the base 101, the body of the second bottle container 1B can be pulled toward the body of the first bottle container 1A by a second guide member 103B against the external tensile force of the first bottle member B1, and in such a pulled state, a second cord member B2 is set around the bodies of the first and second body containers 1A and 1B.