A ceiling-embedded air conditioner comprising: a box-shaped main unit that is embedded in a ceiling of an air-conditioned room, and includes a blowing fan and a heat exchanger surrounding the blowing fan inside; a square decorative panel that is mounted on the lower surface of the main unit and covers the ceiling, the decorative panel including an outer frame portion, an inner frame portion disposed more inside than the outer frame portion, and connection portions connecting the outer frame portion and the inner frame portion at corner portions; a blowoff path that is disposed between the outer frame portion and the inner frame portion; a blowoff opening that is an opening formed between the adjacent connection portions in the blowoff path; spaces formed at the corner portions of the blowoff path under the connection portions constituting corner blowoff portions included in the blowoff path together with the blowoff opening; a wind direction plate that is provided along each side of a square of the decorative panel to cover the blowoff path and is longer than a long side of the blowoff opening, such that part of the air blown by the blowing fan is blown through the blowoff opening and part of the air blown by the blowing fan is blown from the corner blowoff portions; a motor; a motor cover including a motor housing portion; and a shaft portion that is included in the wind direction plate and is pivotally supported and turned by a bearing portion of the motor, wherein the motor is housed in the motor housing portion of the motor cover and is fixed to the connection portion together with the motor cover through a surface of the decorative panel, the motor housing portion includes a bearing surface surrounding the bearing portion on the blowoff opening side, and the bearing surface inclines from a peak of the motor housing portion toward the blowoff opening. a box-shaped main unit that is embedded in a ceiling of an air-conditioned room, and includes a blowing fan and a heat exchanger surrounding the blowing fan inside; a square decorative panel that is mounted on the lower surface of the main unit and covers the ceiling, the decorative panel including an outer frame portion, an inner frame portion disposed more inside than the outer frame portion, and connection portions connecting the outer frame portion and the inner frame portion at corner portions; a blowoff path that is disposed between the outer frame portion and the inner frame portion; a blowoff opening that is an opening formed between the adjacent connection portions in the blowoff path; spaces formed at the corner portions of the blowoff path under the connection portions constituting corner blowoff portions included in the blowoff path together with the blowoff opening; a wind direction plate that is provided along each side of a square of the decorative panel to cover the blowoff path and is longer than a long side of the blowoff opening, such that part of the air blown by the blowing fan is blown through the blowoff opening and part of the air blown by the blowing fan is blown from the corner blowoff portions; a motor; a motor cover including a motor housing portion; and a shaft portion that is included in the wind direction plate and is pivotally supported and turned by a bearing portion of the motor, wherein the motor is housed in the motor housing portion of the motor cover and is fixed to the connection portion together with the motor cover through a surface of the decorative panel, the motor housing portion includes a bearing surface surrounding the bearing portion on the blowoff opening side, and the bearing surface inclines from a peak of the motor housing portion toward the blowoff opening.