A mortgage broker represents companies that invest in mortgage loans. So the mortgage broker arranges for you to get the financing you need to buy your house, and then checks to see which end lender is interested in buying the paper on that loan. You could go to a mortgage broker in your city and end up with a loan from one of your big banks in town. When you use a mortgage broker, you get your money, and the investor gets an investment. The broker gets a fee for providing the loan. Learn more here about what mortgage brokers do and how to choose the right mortgage broker.