A train control system comprising: an on-board device that is mounted on each train traveling on a railroad track and has an vehicle radio set capable of performing wireless communication; a plurality of fixed radio sets that are disposed along the railroad track and capable of performing wireless communication by a time division multiple access method, in which time synchronization is performed to allow the vehicle radio set and the fixed radio sets to communicate with each other only in an allocated time slot, wherein adjacent fixed radio sets of the plurality of fixed radio sets wirelessly communicate with each other to transmit information by relaying the information; and a ground device capable of transmitting information to and receiving information from the on-board device of each train via the fixed radio sets, wherein the ground device calculates a distance from the train to a stop point that is set before a rear end of a preceding train including a preset allowance distance, on the basis of location information of each train obtained by the wireless communication between the vehicle radio set and the fixed radio sets, and transmits information, which includes the distance from the train to the stop point that is set before a rear end of a preceding train, to the fixed radio sets; wherein the on-board device detects location of the train on which the on-board device is mounted on the basis of propagation time of radio waves propagating between the train and two fixed radio sets which are located in front of and behind the train, and transmits the location information of the train to the ground device via the vehicle radio set and the plurality of fixed radio sets when the information received by the the on-board device includes an instruction to the vehicle radio set of the on-board device; wherein the on-board device of each train generates a stop pattern on the basis of the distance from the train to the stop point that is set before a rear end of a preceding train, and performs a travel control so that the train on which the on-board device is mounted travels at a speed equal to or less than the stop pattern, when the information has been received from the ground device via the plurality of fixed radio sets and includes the distance from the train to the stop point that is set before a rear end of a preceding train. an on-board device that is mounted on each train traveling on a railroad track and has an vehicle radio set capable of performing wireless communication; a plurality of fixed radio sets that are disposed along the railroad track and capable of performing wireless communication by a time division multiple access method, in which time synchronization is performed to allow the vehicle radio set and the fixed radio sets to communicate with each other only in an allocated time slot, wherein adjacent fixed radio sets of the plurality of fixed radio sets wirelessly communicate with each other to transmit information by relaying the information; and a ground device capable of transmitting information to and receiving information from the on-board device of each train via the fixed radio sets, wherein the ground device calculates a distance from the train to a stop point that is set before a rear end of a preceding train including a preset allowance distance, on the basis of location information of each train obtained by the wireless communication between the vehicle radio set and the fixed radio sets, and transmits information, which includes the distance from the train to the stop point that is set before a rear end of a preceding train, to the fixed radio sets; wherein the on-board device detects location of the train on which the on-board device is mounted on the basis of propagation time of radio waves propagating between the train and two fixed radio sets which are located in front of and behind the train, and transmits the location information of the train to the ground device via the vehicle radio set and the plurality of fixed radio sets when the information received by the the on-board device includes an instruction to the vehicle radio set of the on-board device; wherein the on-board device of each train generates a stop pattern on the basis of the distance from the train to the stop point that is set before a rear end of a preceding train, and performs a travel control so that the train on which the on-board device is mounted travels at a speed equal to or less than the stop pattern, when the information has been received from the ground device via the plurality of fixed radio sets and includes the distance from the train to the stop point that is set before a rear end of a preceding train.