A connector comprising: a housing member having a fitting part that houses a terminal and is configured to be fitted to a counterpart connector provided in a counterpart device that is a connection target and a fixed part that is configured to be fixed to a fixed wall surface of the counterpart device together with the fitting part in a state in which the fitting part has been fitted to the counterpart connector, the connector further comprising fastening bolts, wherein the fixed part has through holes, able to communicate with fastening holes formed in the fixed wall surface along a fitting direction between the fitting part and the counterpart connector and into which the fastening bolts configured to be fastened to the fastening holes are inserted along the fitting direction, in the state in which the fitting part has been fitted to the counterpart connector, the housing member includes a connector housing and a shield shell and is configured to be fixed to the counterpart device by the fastening bolts being fastened to the fastening holes via the through holes, the fixed part further has a screw hole which penetrates the fixed part along the fitting direction, wherein the screw hole is configured to receive one of the fastening bolts, characterized in that the screw hole is configured to face a closed surface of the fixed wall surface along the fitting direction, and when one of the fastening blots is screwed into the screw hole, is able to abut the closed surface, so that the housing member is separated from the fixed wall surface in a separation direction along the fitting direction, and wherein the through holes are formed as a smooth inner wall surface that is substantially even. a housing member having a fitting part that houses a terminal and is configured to be fitted to a counterpart connector provided in a counterpart device that is a connection target and a fixed part that is configured to be fixed to a fixed wall surface of the counterpart device together with the fitting part in a state in which the fitting part has been fitted to the counterpart connector, the connector further comprising fastening bolts, wherein the fixed part has through holes, able to communicate with fastening holes formed in the fixed wall surface along a fitting direction between the fitting part and the counterpart connector and into which the fastening bolts configured to be fastened to the fastening holes are inserted along the fitting direction, in the state in which the fitting part has been fitted to the counterpart connector, the housing member includes a connector housing and a shield shell and is configured to be fixed to the counterpart device by the fastening bolts being fastened to the fastening holes via the through holes, the fixed part further has a screw hole which penetrates the fixed part along the fitting direction, wherein the screw hole is configured to receive one of the fastening bolts, characterized in that the screw hole is configured to face a closed surface of the fixed wall surface along the fitting direction, and when one of the fastening blots is screwed into the screw hole, is able to abut the closed surface, so that the housing member is separated from the fixed wall surface in a separation direction along the fitting direction, and wherein the through holes are formed as a smooth inner wall surface that is substantially even.