Edward A. Martin, 70, a Washington lawyer for more than 40 years and a Navy veteran of World War II, died of cancer Tuesday at Georgetown University Hospital.

Mr. Martin was born in Princeton, N.J., and earned a bachelor's and law degrees from Georgetown University and its law school, from which he graduated in 1936.

He then began a general law practice here, which, except for service during World War II, he maintained until his death. He also practiced law in New York City and maintained an office there for a number of years.

Mr. Martin, who lived in Washington, was active in fund-raising activities for the Georgetown University Law Center and was involved in drafting legislation to aid colleges and medical schools.

He was a lieutenant commander in the Navy in World War II and served aboard the attack transport Fond Du Lac in the Pacific theater.

Mr. Martin was a member of the University Club.

Survivors include a brother, Henry D., of Morrisville, Pa., and four sisters, Margaret Hartzell of Tinton Falls, N.J., Isabel D'Angelo of Medford Lakes, N.J., Kathleen Blum of Erie, Pa., and Rita Margolis of Ewing Township, N.J.