A switching converter for supplying power to a load, includes: an output circuit including at least a switching transistor, an inductive element, and a rectifying element configured to rectify a current flowing to the inductive element according to switching of the switching transistor; a control circuit configured to drive the switching transistor; a first capacitor configured to generate a power source voltage for the control circuit between both ends of the first capacitor; a start-up circuit installed between an input line to the switching converter and the first capacitor and configured to charge the first capacitor with an input voltage of the input line; and a discharge circuit configured to discharge the first capacitor when the switching converter is started up.