A plug for a connector and the connector are provided. The plug includes an elastic main body, the elastic main body is provided with multiple through holes for cables to pass through; the plug includes a support body, the support body includes a first support body embedded in a middle part of the elastic main body, the through holes are provided around the first support body, and the support body has a hardness greater than that of the elastic main body. In this application, due to the elastic material characteristics of the elastic main body, when the claw members are squeezed by the first nut to contract and then the claw members force the plug tightly from periphery, the plug can generate a certain deformation to be tightly clamped by the claw members and press the cables from the outside to the middle part.