The professional title used for the investors on the British television show Dragon's Den is “Dragons.”
The term gives the programme its title and presents the investors as formidable business figures who scrutinise entrepreneurs' proposals. Each Dragon may offer money in return for an equity share, negotiate different terms or decline to invest.
The naming convention comes from the show's international format lineage. The Japanese source programme used a different title, while the American adaptation Shark Tank uses “sharks” for its investors. Those labels describe comparable roles but are not interchangeable within the British series.
The Dragons are not a formal professional qualification or a legal category. They are television branding for the panel of business investors. Individual Dragons have changed over time, but the collective title has remained part of the show's identity.