The investor room where entrepreneurs make their pitches on Dragons' Den is called the Den.
The title describes the programme's central setting: a room in which business founders face a panel of wealthy investors. Entrepreneurs enter, introduce their company, state the amount of money they want, and offer a percentage of ownership in return.
The name is a metaphor rather than a formal type of financial institution. It suggests that the investors are powerful and that entering the room is a high-pressure test. The format relies on the contrast between the entrepreneur's presentation and the dragons' questioning.
The Den is also distinct from the backstage areas where contestants wait. The televised pitch itself takes place in the investor room, while negotiations may continue after the cameras stop and are subject to further checks.