In a game machine circuit board case inspection method, the inspection of a circuit board case 39 storing a control circuit board 38 having a predetermined electronic part 47 mounted thereon is performed through a seal confirming step 15 for confirming whether or not the circuit board case 39 has been sealed by sealing means 49 and 50, and an intrinsic identification information reading step 18 for reading the intrinsic identification information 48 on said electronic part 47 stored in the circuit board case 39 after the seal confirming step 15. Thereby, the reading of the intrinsic identification information affixed to the electronic part on the control circuit board in the circuit board case, and the confirmation of the sealed state of the circuit board case can be reliably effected, thus preventing dishonest acts, such as replacing the electronic part by a new one in the inspection step and allowing the new one to read a dishonest intrinsic identification information.