An outdoor machine of an air conditioner, comprising: a housing (1, 2, 3, 8, 12) including a front panel and a top panel; a heat exchanger, which is placed on a rear side; a blower fan, which is placed on a front side of the heat exchanger and blows air from the rear side to the front side of the housing (1, 2, 3, 8); a fan motor, which is placed between the heat exchanger and the blower fan and drives the blower fan; and a fan motor mount, to which the fan motor is fixed, wherein the heat exchanger, the blower fan, the fan motor and the fan motor mount are placed inside the housing (1, 2, 3, 8), wherein the fan motor mount comprises: a fan motor support plate, which has a lower end portion fixed to a bottom plate configuring a bottom face of the housing, is provided substantially in a vertical direction toward a top face of the housing (1, 2, 3, 8) and supports the fan motor in a middle of the vertical direction; and a top plate, which connects to fix an upper end portion of the fan motor support plate and the front panel configuring a front face of the housing (1, 2, 3, 8), the top plate being provided along the plane of the top panel and below the top panel; wherein the fan motor support plate is formed with: a plurality of props (16b, 16i) which extends substantially in the vertical direction from the bottom plate; a prop horizontal plane, which connects upper end portions of the props to each other and extends in a front-rear direction from the upper end portions of the props (16b, 16i); a prop front plane, which is downwardly and substantially vertically bent from the prop horizontal plane to face the front panel; a fitting portion, which is provided on the prop horizontal plane and fitted to a rear end of the top plate; and a first screw hole, which is provided on the prop front plane to fix the top plate, wherein the top plate is formed with: a screw fixing piece, which has a shape parallel to the prop front plane and extending downward and is provided with a second screw hole corresponding the first screw hole of the fan motor support plate, wherein the fitting portion of the fan motor support plate is fitted to the rear end of the top plate, and wherein the screw fixing piece of the top plate is located on the front side of the prop front plane of the fan motor support plate. a housing (1, 2, 3, 8, 12) including a front panel and a top panel; a heat exchanger, which is placed on a rear side; a blower fan, which is placed on a front side of the heat exchanger and blows air from the rear side to the front side of the housing (1, 2, 3, 8); a fan motor, which is placed between the heat exchanger and the blower fan and drives the blower fan; and a fan motor mount, to which the fan motor is fixed, wherein the heat exchanger, the blower fan, the fan motor and the fan motor mount are placed inside the housing (1, 2, 3, 8), a fan motor support plate, which has a lower end portion fixed to a bottom plate configuring a bottom face of the housing, is provided substantially in a vertical direction toward a top face of the housing (1, 2, 3, 8) and supports the fan motor in a middle of the vertical direction; and a top plate, which connects to fix an upper end portion of the fan motor support plate and the front panel configuring a front face of the housing (1, 2, 3, 8), the top plate being provided along the plane of the top panel and below the top panel; wherein the fan motor support plate is formed with: a plurality of props (16b, 16i) which extends substantially in the vertical direction from the bottom plate; a prop horizontal plane, which connects upper end portions of the props to each other and extends in a front-rear direction from the upper end portions of the props (16b, 16i); a prop front plane, which is downwardly and substantially vertically bent from the prop horizontal plane to face the front panel; a fitting portion, which is provided on the prop horizontal plane and fitted to a rear end of the top plate; and a first screw hole, which is provided on the prop front plane to fix the top plate, a plurality of props (16b, 16i) which extends substantially in the vertical direction from the bottom plate; a prop horizontal plane, which connects upper end portions of the props to each other and extends in a front-rear direction from the upper end portions of the props (16b, 16i); a prop front plane, which is downwardly and substantially vertically bent from the prop horizontal plane to face the front panel; a fitting portion, which is provided on the prop horizontal plane and fitted to a rear end of the top plate; and a first screw hole, which is provided on the prop front plane to fix the top plate, wherein the top plate is formed with: a screw fixing piece, which has a shape parallel to the prop front plane and extending downward and is provided with a second screw hole corresponding the first screw hole of the fan motor support plate, wherein the fitting portion of the fan motor support plate is fitted to the rear end of the top plate, and wherein the screw fixing piece of the top plate is located on the front side of the prop front plane of the fan motor support plate. a screw fixing piece, which has a shape parallel to the prop front plane and extending downward and is provided with a second screw hole corresponding the first screw hole of the fan motor support plate, wherein the fitting portion of the fan motor support plate is fitted to the rear end of the top plate, and wherein the screw fixing piece of the top plate is located on the front side of the prop front plane of the fan motor support plate.