A ceiling-embedded air conditioner comprising: a casing main body embedded in a ceiling; a decorative panel mounted on the lower surface of the casing main body; a turbo fan disposed in the casing main body; a heat exchanger disposed in the casing main body to surround the outer periphery of the turbo fan; a drain pan that is disposed in the casing main body along the lower side of the heat exchanger; an air suction path that is disposed in the center of the drain pan and reaches the turbo fan; an air blowoff path for conditioned air having passed through the heat exchanger, the air blowoff path being provided at four places along the sides of a virtual square surrounding the air suction path; the air blowoff path being integrated with the drain pan; an air suction opening that is provided in the decorative panel and communicates with the air suction path; and air blowoff openings that are provided in the decorative panel and communicate with the air blowoff path, wherein the air blowoff path is formed in a cuboidal shape having a pair of long side walls (64a and 64b) disposed with a predetermined space therebetween in parallel to the sides of the virtual square and a pair of short side walls (64c and 64d) connecting the ends of the long side walls (64a and 64b), and wherein wind direction plates are rotatably disposed at the air blowoff openings, an airflow guide vane (7, 7a, and 7b) is provided in the air blowoff path to direct part of the blown airflow of the conditioned air toward the short side of an air blowoff opening, the ceiling-embedded air conditioner characterised in that the ceiling-embedded air conditioner further comprising a wind guide path that is formed in a space between adjacent ends of the adjacent air blowoff openings at corner portions of the decorative panel, wherein the airflow guide vane (7, 7a and 7b) allows part of blown airflow of the conditioned air to be blown toward the wind guide path from the adjacent air blowoff paths. a casing main body embedded in a ceiling; a decorative panel mounted on the lower surface of the casing main body; a turbo fan disposed in the casing main body; a heat exchanger disposed in the casing main body to surround the outer periphery of the turbo fan; a drain pan that is disposed in the casing main body along the lower side of the heat exchanger; an air suction path that is disposed in the center of the drain pan and reaches the turbo fan; an air blowoff path for conditioned air having passed through the heat exchanger, the air blowoff path being provided at four places along the sides of a virtual square surrounding the air suction path; the air blowoff path being integrated with the drain pan; an air suction opening that is provided in the decorative panel and communicates with the air suction path; and air blowoff openings that are provided in the decorative panel and communicate with the air blowoff path, wherein the air blowoff path is formed in a cuboidal shape having a pair of long side walls (64a and 64b) disposed with a predetermined space therebetween in parallel to the sides of the virtual square and a pair of short side walls (64c and 64d) connecting the ends of the long side walls (64a and 64b), and wherein wind direction plates are rotatably disposed at the air blowoff openings, an airflow guide vane (7, 7a, and 7b) is provided in the air blowoff path to direct part of the blown airflow of the conditioned air toward the short side of an air blowoff opening, the ceiling-embedded air conditioner characterised in that the ceiling-embedded air conditioner further comprising a wind guide path that is formed in a space between adjacent ends of the adjacent air blowoff openings at corner portions of the decorative panel, wherein the airflow guide vane (7, 7a and 7b) allows part of blown airflow of the conditioned air to be blown toward the wind guide path from the adjacent air blowoff paths.