Abstract: An automatic train operation apparatus capable of realizing an optimal train operation with an improved reliability. The apparatus includes: an ATO/C system including a plurality of ATO/C units redundantly provided, each ATO/C unit having a fail safe configuration formed by a plurality of execution processors and a supervisor processor for monitoring normal operations of the execution processors, each execution processor being capable of executing an automatic train operation program, and all of the execution processors in the plurality of ATO/C units executing an identical automatic train operation program simultaneously; and a majority logic circuit for selecting an output obtained by a majority of the execution processors in the ATO/C units of the ATO/C system as a control command output for controlling a train operation. Each execution processor in the ATO/C system operates as a neural network with a learning function.