A filter for filtering of electromagnetic interference, with a base element, with at least one electrical filter component and with at least two input terminal contacts and at least two output terminal contacts for connection of an electric line, the input terminal contacts being connected to the output terminal contacts by conductor paths located on the base element. In the filter, a simple configuration and flexible use are ensured by each conductor path having at least two longitudinal contacts, via which a filter component can be electrically connected to a conductor path such that the electrical connection of the conductor path leads between the two longitudinal contacts by the filter component, and each conductor path has at least one cross contact so that two conductor paths are electrically connected to one another by way of a filter component when the filter component is electrically connected to the cross contacts.