Abstract: The invention relates to a housing for electronic units having printed circuit boards and heat sinks attached to said printed circuit boards. The housing comprises side walls formed by a first and a second u-shaped-section each having a central portion and a first and a second side cheek extending perpendicularly to the central portion. The u-shaped-sections extend into each other with clearance along longitudinal edges of the side cheeks. The central portions of the u-shaped-sections are connected to opposite end faces of the heat sinks. This results in an inexpensive construction with stability in dimensions. The heat transmission between the heat sinks and the housing is good.