Abstract: The plunger tube connector for a container for packaging a product, particularly a chemical product, comprises a body provided with a through-bore for the passage of the plunger tube, a gripping means mounted on the body and provided with an opening for the passage of said plunger tube, and a compression ring arranged axially at least in part between the body and the gripping means, and comprising a surface of contact with an outer surface of the plunger tube. The compression ring interacts with the body and/or the gripping means in order, when said body and said gripping means are brought closer to one another axially, to obtain a radial shift of said ring towards the inside.