Abstract: A box-like or sleeve-like piezoelectric resonator housing which can be sealed hermetically having connection conductors suitable for surface mounting, consisting of two housing parts which can be connected together, connection conductors being led through a housing part in an insulated manner and at least one further connection conductor being connected to the housing part. The housing is divided into two parts along a diagonal plane to render components mounted in the lower part accessible after the lower part is mounted on a surface and before the upper part is joined to the lower part.