A washing device is provided with a washing member (8) that is disposed in an insertion port (2i) in a housing portion (2) into which a protruding object to be washed (M) can be inserted, that rotates along with a brush mechanism portion (3), that includes a washing portion (8w) on the upper surface thereof, that includes, in the middle thereof, an insertion hole (8i) through which the object to be washed (M) is inserted and that is formed in the shape of a disc a jet portion (5) that includes an upper jet portion (5u) disposed above the washing member (8) and a lower jet portion (5d) disposed below the washing member (8) and washing solution supply means (6) that supplies washing solution (L) to the upper jet portion (5u) and/or the lower jet portion (5d). Washing is performed by jetting the washing solution (L), at least, above the washing member (8) from the jet portion 5 and rotating the washing member (8), and thereafter the jetting of the washing solution (L) above the washing member (8) is stopped and the washing member (8) is rotated to remove the remaining washing solution.
