To acquire and collect difficulties in transmission in a game machine, and to feed-back information for product improvement to a development process.

A game machine comprises: a main substrate for executing control related to a game including internal lottery processing; a sub-substrate for executing processing related to a prescribed performance by receiving a command from the main substrate; a device for executing the performance; a peripheral substrate for controlling the device on the basis of the command from the sub-substrate; a difficulties-in-transmission detection part for detecting at least one of a difficulties in transmission between the sub-substrate and the peripheral substrate and a difficulties in transmission between the main substrate and the sub-substrate; a difficulty storage part for storing the difficulties in transmission detected by the difficulties-in-transmission detection part; and an output means connected to the difficulty storage part. The difficulty storage part holds a storage content even at powering-off.