About 500 people marched in Warsaw Saturday demanding that Communist legislation allowing abortion be repealed immediately.

The demonstrators, carrying banners and posters, delivered a letter to the official residence of President Lech Walesa thanking him for supporting efforts to outlaw abortion.Walesa often has stressed that he is a devout Roman Catholic and thus opposes abortion.

"We hope that common effort will lead to lifting the Communist legislation of April 1956 and to saving the life of thousands of the smallest, defenseless Poles," said the letter.