Contact jack for electrical connection to a plug, having: - a plug receiving section with: - a first clamping member, - a second clamping member, wherein the first clamping member is arranged opposite the second clamping member and the two clamping members (50, 60) limit between them a plug receiving space designed for receiving the plug, - a first spring section for elastic enlargement of the plug receiving space, wherein the first clamping member is arranged on the first spring section, - a second spring section for elastic enlargement of the plug receiving space, wherein the second clamping member is arranged on the second spring section, - a supporting section connected to the plug receiving section and designed to support the plug receiving section against a force directed in the direction of a longitudinal axis of the plug receiving space and in the direction of the supporting section, - a rear wall parallel to the longitudinal axis of the plug receiving space, characterized by - a first side wall and a second side wall, wherein the first side wall and the second side wall are arranged parallel to the longitudinal axis of the plug receiving space and on the rear wall, wherein the rear wall and the two side walls (110, 120) limit the plug receiving section and the first spring section is arranged on the first side wall and the second spring section on the second side wall, and wherein in the direction of the longitudinal axis of the plug receiving space the rear wall and/or the first side wall and the second side wall project above the two clamping members (50, 60) and/or the two spring sections (45, 55). - a plug receiving section with: - a first clamping member, - a second clamping member, wherein the first clamping member is arranged opposite the second clamping member and the two clamping members (50, 60) limit between them a plug receiving space designed for receiving the plug, - a first spring section for elastic enlargement of the plug receiving space, wherein the first clamping member is arranged on the first spring section, - a second spring section for elastic enlargement of the plug receiving space, wherein the second clamping member is arranged on the second spring section, - a first clamping member, - a second clamping member, wherein the first clamping member is arranged opposite the second clamping member and the two clamping members (50, 60) limit between them a plug receiving space designed for receiving the plug, - a first spring section for elastic enlargement of the plug receiving space, wherein the first clamping member is arranged on the first spring section, - a second spring section for elastic enlargement of the plug receiving space, wherein the second clamping member is arranged on the second spring section, - a supporting section connected to the plug receiving section and designed to support the plug receiving section against a force directed in the direction of a longitudinal axis of the plug receiving space and in the direction of the supporting section, - a rear wall parallel to the longitudinal axis of the plug receiving space, - a first side wall and a second side wall, wherein the first side wall and the second side wall are arranged parallel to the longitudinal axis of the plug receiving space and on the rear wall, wherein the rear wall and the two side walls (110, 120) limit the plug receiving section and the first spring section is arranged on the first side wall and the second spring section on the second side wall, and wherein in the direction of the longitudinal axis of the plug receiving space the rear wall and/or the first side wall and the second side wall project above the two clamping members (50, 60) and/or the two spring sections (45, 55).