An elevator device comprising: a plurality of hoisting machines (4, 5) including driving sheaves (8, 12), motors (9,13) for rotating the driving sheaves (8, 12), and hoisting machine brakes for braking rotation of the driving sheaves (8, 12), respectively; suspending means wound around the driving sheaves (8, 12); a car suspended by the suspending means, the car being raised and lowered by the plurality of hoisting machines (4, 5); and a plurality of brake control sections (14, 15) for controlling the corresponding hoisting machine brakes, respectively, wherein each of the hoisting machine brakes has a braking force large enough to stop the car by itself, characterized in that each of the plurality of brake control sections (14, 15) includes a plurality of calculation sections (23a, 23b, 23c, 23d), and the plurality of calculation sections (23a, 23b, 23c, 23d) are capable of detecting a failure of the plurality of calculation sections (23a, 23b, 23c, 23d) by comparing own results of calculations and cause a corresponding one of the hoisting machine brakes to perform a braking operation, thereby stopping the car, upon detection of the failure of the plurality of calculation sections (23a, 23b, 23c, 23d), further comprising a plurality of electromagnetic switches (16a, 16b, 16c, 16d), whereby respective pairs of electromagnetic switches are provided for turning ON/OFF electric power supply to a corresponding hoisting machine brake, wherein the electromagnetic switches of each pair are connected to each other in series, and upon detection of the failure of the plurality of calculation sections (23a, 23b, 23c, 23d), the plurality of brake control sections (14, 15) turn OFF a corresponding one of the plurality of electromagnetic switches (16a, 16b, 16c, 16d). a plurality of hoisting machines (4, 5) including driving sheaves (8, 12), motors (9,13) for rotating the driving sheaves (8, 12), and hoisting machine brakes for braking rotation of the driving sheaves (8, 12), respectively; suspending means wound around the driving sheaves (8, 12); a car suspended by the suspending means, the car being raised and lowered by the plurality of hoisting machines (4, 5); and a plurality of brake control sections (14, 15) for controlling the corresponding hoisting machine brakes, respectively, wherein each of the hoisting machine brakes has a braking force large enough to stop the car by itself, characterized in that each of the plurality of brake control sections (14, 15) includes a plurality of calculation sections (23a, 23b, 23c, 23d), and the plurality of calculation sections (23a, 23b, 23c, 23d) are capable of detecting a failure of the plurality of calculation sections (23a, 23b, 23c, 23d) by comparing own results of calculations and cause a corresponding one of the hoisting machine brakes to perform a braking operation, thereby stopping the car, upon detection of the failure of the plurality of calculation sections (23a, 23b, 23c, 23d), further comprising a plurality of electromagnetic switches (16a, 16b, 16c, 16d), whereby respective pairs of electromagnetic switches are provided for turning ON/OFF electric power supply to a corresponding hoisting machine brake, wherein the electromagnetic switches of each pair are connected to each other in series, and upon detection of the failure of the plurality of calculation sections (23a, 23b, 23c, 23d), the plurality of brake control sections (14, 15) turn OFF a corresponding one of the plurality of electromagnetic switches (16a, 16b, 16c, 16d).