The EMCDDA's Evaluation Instruments Bank is a document archive of tools created to encourage evaluation using reliable methods, and to help to standardise these tools at European level. The Instruments Bank contains tools for evaluating both prevention and treatment programmes. By entering the specific criteria of the intervention to be evaluated, the database provides the user with the most suitable evaluation tool, together with comments on its use and references to related studies.The Evaluation Instruments Bank is continuously updated and now holds 155 evaluation instruments in the treatment field and 65 in the prevention field (some clustered) - it now holds a total of fifteen languages (thirteen EU languages plus Norwegian and Russian). Please bear in mind that the EIB is a collection of free none-copyright protected evaluation instruments and that some of them translated language versions might have undergone considerable adjustments and hence might look considerably different than their respective originals.