Philip B. Pittle, 79, former owner of a chain of bakeries in Washington, died Tuesday at Suburban Hospital in Bethesda following a heart attack.

He had established Pittle's Bakery in 1931, and expanded to eight stores, located mainly in Northwest and Southwest Washington in addition to one shop in Shirlington.

Baking was done on the premises of each bakery. In addition, Pittle's, which called itself "Bakers of Reputation," was one of the first bakeries here to make its own ice cream.

Mr. Pittle sold the bakeries and went into semiretirement in the mid-1950s. But he soon returned to active work and was a master baker at Posin's Bakery-Delicatessen in Washington and Danny's Pastry Shoppe in Silver Spring until his death.

He also was a local representative for the Texas Refinery Corp., selling roofing materials.

Born in Zychlin, Poland, he came here as a youth. His father owned a tailor shop near the old Griffith Stadium for many years. Mr. Pittle had learned to be a baker on the boat coming to this country and decided to have his own business, family members said.

He was a charter member of the Samuel Gompers Lodge of the Masons and recently received a 50-year pin.

He is survived by his wife, Frances, of the home in Silver Spring; three sons, Dr. R. David, of Rockville, Joseph T., of Gainesville, Fla., and John E., of the home; a daughter, Joyce Manspeaker, of Bowie; two brothers, Maurice and Louis, and a sister, Lillian Sickle, all of Silver Spring, seven grandchildren and two great-grandchildren.

The family suggests that expressions of sympathy may be in the form of contributions to the American Heart Association or the American Cancer Society.