The invention relates to a suction device (1, 10, 20, 30) comprising a suction portion (3, 13, 23, 33) to be sucked by a user's mouth, characterized in that probiotics (7, 17, 27, 37) are adhered to or immobilized on the outer surface of the suction device (1, 10, 20, 30) such that the probiotics (7, 17, 27, 37) are segregated from the outer surface by external factors when the suction device (1, 10, 20, 30) is sucked.
