To provide an operation arrangement apparatus in an operation management system capable of improving the efficiency of operation arrangement work to return to normal operation by improving operation prediction accuracy at the disturbance of an operation schedule, and presenting operation proposals in order in accordance with an actual service.

A content (control schedule) inputted by a commander to the operation arrangement apparatus 2 when an operation schedule is disrupted is incorporated into a prediction simulation function without waiting for an operation status of a train as a control result of a signal facility 4 by an operation management apparatus 3 receiving the content so as to improve the accuracy of prediction simulation and achieve the early presentation of an operation arrangement proposal 13. With respect to an operation arrangement proposal 15 presented by the operation arrangement apparatus 2, the presentation order of the operation arrangement proposal 15 and the selection of a main proposal among a plurality of operation arrangement proposals are automatically adjusted based on histories of approval 17 and disapproval 22 by the commander so as to present the operation arrangement proposal in accordance with an actual service.