An outdoor unit comprising: a body casing including an intake portion that is formed in a lateral side of the body casing and through which air is sucked, a blowout portion formed in a top of the body casing, the blowout portion being configured to blow out the air sucked through the intake portion, and an air path formed between the intake portion and the blowout portion; a heat exchanger disposed in the air path; a fan unit disposed in the air path above the heat exchanger; and a mounting member mounting the fan unit on the body casing, wherein the mounting member includes a fixture portion fixed to the body casing, a fan-unit holding portion that has a flat shape and on which the fan unit is held and a connecting portion configured to connect the fixture portion and the fan-unit holding portion, and the fixture portion, the fan-unit holding portion and the connecting portion are formed integrally, and the fan-unit holding portion retreats downward from the fixture portion, and wherein the body casing is shaped to include four side faces on lateral sides, and the mounting member is fixed to the body casing on both sides of the side faces facing each other, characterized in that the intake portion is formed in each of the four side faces, the heat exchanger includes four heat exchange units each facing each of the intake portions and configured to exchange heat with the air sucked through each of the intake portions, the fan unit includes a fan motor provided with a drive shaft protruding upward and a fan mounted on the drive shaft, the fan includes a boss in a center and blades formed around the boss, an upper part of the boss retreats downward from tops of the blades, and the outdoor unit further comprises a fan guard portion configured to cover a top of the fan, wherein an outer periphery of the fan guard portion is fixed to the body casing. a body casing including an intake portion that is formed in a lateral side of the body casing and through which air is sucked, a blowout portion formed in a top of the body casing, the blowout portion being configured to blow out the air sucked through the intake portion, and an air path formed between the intake portion and the blowout portion; a heat exchanger disposed in the air path; a fan unit disposed in the air path above the heat exchanger; and a mounting member mounting the fan unit on the body casing, wherein the mounting member includes a fixture portion fixed to the body casing, a fan-unit holding portion that has a flat shape and on which the fan unit is held and a connecting portion configured to connect the fixture portion and the fan-unit holding portion, and the fixture portion, the fan-unit holding portion and the connecting portion are formed integrally, and the fan-unit holding portion retreats downward from the fixture portion, and wherein the body casing is shaped to include four side faces on lateral sides, and the mounting member is fixed to the body casing on both sides of the side faces facing each other, characterized in that the intake portion is formed in each of the four side faces, the heat exchanger includes four heat exchange units each facing each of the intake portions and configured to exchange heat with the air sucked through each of the intake portions, the fan unit includes a fan motor provided with a drive shaft protruding upward and a fan mounted on the drive shaft, the fan includes a boss in a center and blades formed around the boss, an upper part of the boss retreats downward from tops of the blades, and the outdoor unit further comprises a fan guard portion configured to cover a top of the fan, wherein an outer periphery of the fan guard portion is fixed to the body casing.