Plug connector comprising a housing, and comprising a locking comb, wherein the locking comb has a supporting element, wherein the housing is designed to hold the locking comb, wherein a holding element is formed on the housing, wherein the housing has a first housing wall with a first inner face and a first outer face which is situated opposite the first inner face, wherein the housing has a second housing wall which extends parallel to the first housing wall and has a second inner face and a second outer face which is situated opposite the second inner face, wherein the second inner face delimits the holding element, wherein the locking comb, which is composed of electrically non-conductive material, is designed to lock electrical contact elements in contact element holding chambers of the contact carrier, wherein the locking comb has a locking comb back, wherein a first tine, a second tine and a third tine are fixedly connected to the locking comb back, wherein the first tine, the second tine and the third tine extend parallel to one another, wherein the second tine is arranged between the first tine and the third tine, wherein the second tine has the supporting element, characterized in that at least one contact carrier having at least one electrical contact element is latched to the housing, wherein the housing has at least one first latching element, wherein the at least one first latching element can be latched to a second latching element of a first contact carrier for electrical contact elements, wherein the first inner face delimits the holding element, wherein the first latching element is fixedly connected to the first outer face, wherein the supporting element supports the first inner face in such a way that, when a force acts on the first latching element, deflection of the first housing wall, at least in the region of the first latching element, in the direction of the holding element is prevented, wherein the housing is designed to hold a second contact carrier which extends parallel to the first contact carrier, wherein the housing has at least one third latching element, wherein the at least one third latching element can be latched to a fourth latching element of a second contact carrier for electrical contact elements, wherein the third latching element is fixedly connected to the second outer face, wherein the supporting element supports the second inner face in such a way that, when a force acts on the third latching element, deflection of the second housing wall, at least in the region of the third latching element, in the direction of the holding element is prevented, wherein the first tine and the second tine can be inserted into insertion slots in the first contact carrier, and the second tine and the third tine can be inserted into insertion slots in the second contact carrier which is adjacent to the first contact carrier, wherein the holding element interacts with the supporting element of the locking comb in such a way that the first latching element and the second latching element are prevented from being detached from one another when the locking comb is inserted into the contact carrier and is moved to a locking position, wherein both the first contact carrier, which is latched to the housing, and the second contact carrier, which is latched to the housing, are prevented from being detached by virtue of the supporting element when the locking comb is inserted into the contact carrier and is moved to a locking position.