according to one aspect of the invention , there is provided an electronic apparatus having a circuit board supporting structure , the circuit board supporting structure including : a casing including a first body and a second body , the first body having a first boss portion , the second body having a second boss portion ; a jig including a cylindrical portion having , and a flange portion formed on an outer periphery , the cylindrical portion configured to slidably receive the first boss portion and the second boss portion in an inner peripheral wall ; and a circuit board disposed in the casing . the first and second boss portions are configured to be fastened by a bolt member ; the circuit board has a hole and a joining region provided around the hole , the hole configured to allow the cylindrical portion to penetrate therethrough ; and the joining region is configured to be soldered to the flange portion .