A fixing device is provided. In a fixing device, a heating member that heats a fixing belt includes a heat generating member that has a heat generating layer that generates heat due to being energized, and a heat radiating member. In the heat radiating member, a heat receiving piece of a first heat radiating section and a heat receiving piece of a second heat radiating section are combined with each other to form a heat receiving section, and a heat transfer piece of the first heat radiating section and a heat transfer piece of the second heat radiating section are combined with each other to form a heat transfer section. Heat pipes that are meandering capillary tube heat pipes are formed inside the first heat radiating section and the second heat radiating section.