A method of the present invention for manufacturing a fixing belt has the step of covering an outer circumferential surface of a hollow cylindrical mold with a fluorocarbon resin tube that is to be a releasing layer, prepares a hollow cylindrical product by forming an elastic layer and a base material layer in this order on the releasing layer, and then turns over the hollow cylindrical product. Such a method for manufacturing a fixing belt makes it possible to obtain a fixing belt of the present invention in which a releasing layer serving as an outermost layer is constituted by a fluorocarbon resin tube having a heat shrinkage ratio of not more than 5%. This makes it possible to provide: a fixing belt that is more inexpensive than before while having a releasing layer constituted by a highly durable fluorocarbon resin tube; and a fixing device including the same.