The airline has in the past focused its marketing efforts on holidaymakers, but is now looking to increase its share of the business market.
Print, poster and radio ads created by The Bank will run from this week, carrying the strapline 'You're a business. You work it out'.
Last year easyJet hired Sledge as its first ad agency to develop the 'Let's fly' positioning. However, insiders have suggested the agency is not working for the airline on a permanent basis.
EasyJet spent £19m on advertising last year, and the business drive is believed to account for a sizeable chunk of its 2005 marketing budget.