The European Patent Office (EPO) is one of the two organs of the European Patent Organisation (EPOrg), the other being the Administrative Council.

The EPO acts as executive body for the organization while the Administrative Council acts as its supervisory body as well as, to a limited extent, its legislative body. The actual legislative power to revise the European Patent Convention lies with the Contracting States themselves when meeting at a Conference of the Contracting States. Within the European Patent Office, examiners are notably in charge of studying European patent applications, filed by applicants, to decide whether to grant a patent for an invention. The patents granted by the European Patent Office are called European patents.