Elena Dragomirescu, 83, has not shown any signs of life since the morning of Friday, October 16, when she left her home.
They are worried about her because she does not speak Greek and has health problems.
She was wearing black pants, a long-sleeved knitted gray blouse and black shoes.
She is 1.60 tall, has brown eyes and short white hair.
For her disappearance it has meant Silver Alert.