A drive device capable of allowing a brake operation of a braking mechanism of the drive device to suppress a mechanical load applied to a mechanism unit (i.e., a robot mechanical section) provided with the drive device. The drive device includes a first braking mechanism provided in a first motor to execute a first brake operation on an operation shaft, a second braking mechanism provided in a second motor to execute a second brake operation on the operation shaft, and a brake controller configured to control the first braking mechanism and the second braking mechanism to allow the first brake operation and the second brake operation to be continuously executed after starting the first brake operation before starting the second brake operation.