Drain pan

A drain pan (1) is disposed below a cooling unit (E) that cools air, receives water of condensation that falls from the cooling unit, and guides the water of condensation into an outer portion of the vehicle air-conditioning apparatus. The drain pan (1) includes a water receiving region (R), and receives water of condensation; a drain port (4) disposed at a bottom-center portion of the water receiving region; and a rib (5,30) disposed upright in the bottom portion on a dividing line that passes through the drain port and divides the water receiving region.