The invention relates to a housing (1) for a switchgear unit module of a switchgear unit, which forms a common gas chamber (3) suitable for receiving an insulating gas and three gas-insulated busbar nominal conductors of the switchgear unit module. The housing (1) comprises: three first busbar openings (14, 24, 34), wherein the three first busbar openings (14, 24, 34) are arranged, in terms of the area, in a first opening plane E1 and along a first straight line (4); three second busbar openings (16, 26, 36), wherein the three second busbar openings (16, 26, 36) are arranged on a side of the housing opposite of the three first busbar openings (14, 24, 34); and three discharge conductor openings (56, 66, 76), wherein the three discharge conductor openings (56, 66, 76) are disposed, in terms of the area, in a second opening plane E2 and along a second straight line (6).