Bessie Dinowitz Diener, 90, active for many years in Jewish philanthropic affairs, died Friday at the Hebrew Home of Greater Washington, where she had lived for the past two years.

Born in Russia, she came to this country as a young girl with her family, and settled in Baltimore. She moved a short while later to Washington and lived most of her live here.

Mrs. Diener helped organize the Washington Ladies Auxiliary of the Jewish Consumptive Relief Society, which has headquarters in Denver. It is now known as the American Cancer Research Center and Hospital, of which she was a life member.

She was a founder of the Women's Auxiliary of the Hebrew Home for the Aged which is now the Hebrew Home of Greater Washington.

A life member of Hadassah. Mrs. Diener had been active in the United Jewish Appeal of Greater Washington and had served on its board of trustees.

Her first husband. Louis Dinowitz, a real estate and insurance businessman, died about 20 years ago. She then married Hyman Diener, former president of Diener's carpet company, who died in 1973.

She is survived by a daughter, Pearl Tulman, four stepsons, Daniel, Walter, Milton and Dr. Jack Diener, and two stepdaughters, Reba Baritz and Mollie Risnar, all of Washington: 22 grandchildren 12 great-grandchildren, and eight great-great-grandchildren.