To directly obtain and output an 8-bit random number signal from a binary random number generator.

This generator consists of an 8-bit random number generation part 2 where eight random number generation circuits 3 which output random number signals (e) obtained by digitizing a noise signal (a) are provided in parallel and an 8-bit parallel transmission part 14 which takes individual random number signals (e) as the input and obtains a binarized signal (g) by sampling respective random number signals (e) at the same point of time in accordance with a control signal (h) from the outside and outputs this signal (g) as an 8-bit random number output (f), thus generating the 8-bit random number output (f) easy to handle at an 8-fold conversional speed of the speed before.