A resin-junction body includes a first resin member, a second resin member including a concave portion and laminated on the first resin member so as to contact the first resin member at a contact surface. The concave portion comprises a bottom face on a first resin member side. The resin-junction body further includes a joining layer that joins the first resin member and the second resin member and that extends from the bottom face towards the first resin member.

A device for joining together two joining partners includes a first component receptacle for receiving the first joining partner and a second component receptacle for receiving the second joining partner. The first component receptacle and the second component receptacle are rotatable about a first axis of rotation and a second axis of rotation, respectively. The first axis of rotation and the second axis of rotation are perpendicular to each other.