Printed board assembly including a first printed circuit board (11, 71), a second printed circuit board (12, 72) arranged perpendicular to the first printed circuit board (11, 71) and a connector (1, 21, 31, 41, 51, 61, 81) for removably connecting the first printed circuit board (11, 71) to the second printed circuit board (12, 72), the connector (1, 21, 31, 41, 51, 61, 81) having a locking portion for inserting through an opening of the first printed circuit board (11, 71) and a head portion for retaining the connector (1, 21, 31, 41, 51, 61, 81) on the first printed circuit board (11, 71), wherein the locking portion includes a first locking element adapted to interact with a second locking element of the second printed circuit board (12, 72) for positive locking the connector (1, 21, 31, 41, 51, 61, 81) and the second printed circuit board (12, 72) regarding forces in a direction perpendicular to the first printed circuit board (11, 71) such that the first printed circuit board (11, 71) is fixed to the second printed circuit board (12, 72) when the connector (1, 21, 31, 41, 51, 61, 81) is inserted through the opening of the first printed circuit board (11, 71) and the first and the second locking element are positive locked to each other, wherein the first printed circuit board (11,71) includes the opening, the second printed circuit board (12, 72) includes the second locking element, wherein the first and the second printed circuit board (12, 72) are fixed to each other in that the connector (1, 21, 31, 41, 51, 61, 81) is inserted with its locking portion through the opening and retained by its head portion on the first printed circuit board (11, 71) and in that the connector (1,21,31,41,51,61,81) is positive locked to the second printed circuit board (12, 72) by means of the first and second locking element, wherein the head portion has a base (5, 55) for fitting through the opening of the first printed circuit board (11, 71) and a retaining section for retaining the connector (1, 21, 31, 41, 51, 61, 81) on the first printed circuit board (11, 71), wherein the base (5, 55) is generally cylindrical and wherein the head portion includes a flange like edge (4.1, 7.1, 11.3, 19) extending at least partially over the cylindrical base (5, 55), wherein the locking portion includes an elongated body and where the first locking element includes a hook-like protrusion (7, 87) at an end region of the elongated body opposite the head portion for latching into an opening or recess of the second printed circuit board (12, 72), wherein the first locking element is a generally flat locking area (8, 18) facing the lower side of the flange like edge (4.1, 7.1, 11.3, 19). the connector (1, 21, 31, 41, 51, 61, 81) having a locking portion for inserting through an opening of the first printed circuit board (11, 71) and a head portion for retaining the connector (1, 21, 31, 41, 51, 61, 81) on the first printed circuit board (11, 71), wherein the locking portion includes a first locking element adapted to interact with a second locking element of the second printed circuit board (12, 72) for positive locking the connector (1, 21, 31, 41, 51, 61, 81) and the second printed circuit board (12, 72) regarding forces in a direction perpendicular to the first printed circuit board (11, 71) such that the first printed circuit board (11, 71) is fixed to the second printed circuit board (12, 72) when the connector (1, 21, 31, 41, 51, 61, 81) is inserted through the opening of the first printed circuit board (11, 71) and the first and the second locking element are positive locked to each other, wherein the first printed circuit board (11,71) includes the opening, the second printed circuit board (12, 72) includes the second locking element, wherein the first and the second printed circuit board (12, 72) are fixed to each other in that the connector (1, 21, 31, 41, 51, 61, 81) is inserted with its locking portion through the opening and retained by its head portion on the first printed circuit board (11, 71) and in that the connector (1,21,31,41,51,61,81) is positive locked to the second printed circuit board (12, 72) by means of the first and second locking element, wherein the head portion has a base (5, 55) for fitting through the opening of the first printed circuit board (11, 71) and a retaining section for retaining the connector (1, 21, 31, 41, 51, 61, 81) on the first printed circuit board (11, 71), wherein the base (5, 55) is generally cylindrical and wherein the head portion includes a flange like edge (4.1, 7.1, 11.3, 19) extending at least partially over the cylindrical base (5, 55), wherein the locking portion includes an elongated body and where the first locking element includes a hook-like protrusion (7, 87) at an end region of the elongated body opposite the head portion for latching into an opening or recess of the second printed circuit board (12, 72), wherein the first locking element is a generally flat locking area (8, 18) facing the lower side of the flange like edge (4.1, 7.1, 11.3, 19).