<p>A drain up device comprises a drain pan (18) for storing drain water (DW), and a drain pump (30) for sucking and discharging the drain water (DW) stored in the drain pan (18). The drain pump (30) has an impeller member (32b<SUB>1</SUB>) for sucking the drain water (DW). On the extension of the rotary shaft of the impeller member (32b<SUB>1</SUB>), a rotary member (32b<SUB>2</SUB>) rotating to stir the drain water (DW) in the drain pan (18) is provided. The rotary member (32b<SUB>2</SUB>) has an outside diameter smaller than the inside diameter of a drain water suction port (33) of the drain pump (30). With such an drain up device, generation and growth of slime around the drain pump are suppressed effectively.</p>
