An outdoor device for an air conditioner is provided. The outdoor device may include a cabinet including at least one suction panel, a base provided at a lower portion of the cabinet, and a compressor and heat exchanger, which may be provided on the base. The base may include a base body, on which the compressor may be provided, an edge portion provided along a circumference of the base body, the edge portion including at least one seat that supports the heat exchanger, and a support guide provided on the edge portion to increase an area by which the heat exchanger may be supported.