The present invention relates to a receptacle connector, comprising: a plurality of contacts for electrically connecting a plug connector and a substrate which is provided in an electronic device; an insulating part to which the contacts are coupled; a shell to which the insulating part is coupled; and a sealing part for sealing between the electronic device and the shell, wherein the shell includes a shell body for accommodating the insulating part, and a first support part for supporting the sealing part, wherein the first support part may include: a first rear support member for supporting the sealing part at the rear of the sealing part so that the rearward movable distance of the sealing part is limited; a first outer support member which protrudes forward from the first rear support member so as to support the inner surface of the sealing part; a first connecting member which is coupled to the front of the first outer support member; and a first inner support member which is coupled to each of the first connecting member and the shell body and is disposed spaced apart from the first outer support member, wherein the shell body is formed to have a greater thickness than at least one of the first outer support member and the first inner support member.