A reactor includes a heat dissipation sheet and a main body. The main body includes a first coil, a second coil, a resin cover and a pressing frame. The resin cover has a central section that covers side surfaces of the first and second coil between the first and second coil. The pressing frame extends along outer peripheries of bottom surfaces of the first coil and the second coil. The pressing frame is configured to press the heat dissipation sheet toward the cooler. The pressing frame has a coupled section that is coupled to a lower surface of the central section. The pressing frame is able to be displaced in a vertical direction with respect to the resin cover other than the central section.