The gay marriage measure now heads to the full Senate, which could vote on it as early as next week. Supporters there say at this point they are one vote shy of the 24 needed to pass the bill.
Senate Minority Leader Nancy Jacobs says it appears any attempt to filibuster the bill will fail. Leaders in the House say they're confident the measure will pass that chamber.
The Senate committee added a clause to the bill designed to protect religious groups from having to perform same-sex marriage ceremonies or provide services for those weddings.
Gov. Martin O'Malley says he will sign the measure if it reaches him. If approved, Maryland would become the sixth state in the country to allow same sex marriage.