A distributed processing unit which permits easy modification of set data that has been written in a memory (19) of a coin selector (1-1) which constitutes a processor. A computer (50) is connected to a connection line that connects the memory (19) and a CPU (11) of the coin selector (1-1), and to a mode terminal of the CPU (11), signals applied to the mode terminal of the CPU (11) prohibit access to the memory (19) by the CPU (11) and enable direct access to the memory (19) by the computer (50) so that the set data in the memory (19) can be overwritten under the control of the computer (50).