Waterproofing structure for connector

A waterproofing structure for a connector comprising:

• a first housing configured to comprise a first terminal reception chamber for receiving a terminal;
• and
• a second housing configured to comprise a second terminal reception chamber for receiving a terminal,
• wherein an opening end of the first terminal reception chamber is opposed to an opening end of the second terminal reception chamber, so that a gap with which circumferential edges of the opening ends are opposed to each other is configured to be sealed;
• wherein an annular member made of resin is provided at the circumferential edge of the opening end of the first terminal reception chamber, the annular member having an inner circumferential surface widened toward the second housing;
• wherein the circumferential edge of the opening end of the second terminal reception chamber abuts against the inner circumferential surface of the annular member;
• and
• wherein when the connector vibrates, the annular member is opened and closed against the circumferential edge of the opening end of the second terminal reception chamber.