An on-demand vehicle operation management device, comprising operation management means configured to determine, through inclusion of a computer device, an operation schedule of an on-demand vehicle based on requests received from a plurality of users, said requests being derived from demand information of a user's use of the on-demand vehicle, said information comprising a desired boarding/drop-off location, a desired departure or arrival time, added time acceptable by the user with respect to the desired departure or arrival time and user identification, and manage an operation of the on-demand vehicle in accordance with said determined operation schedule, wherein said operation management means is configured to: divide an operation area in which said on-demand vehicle operates into a plurality of predetermined sub-areas (A, B, C); search for routes on which said on-demand vehicle may travel for said each divided sub-area (A, B, C); and determine each of said searched routes as a candidate route; determine one of the routes searched for said each divided sub-area (A, B, C) as a basic route (A100, B100) for operating the on-demand vehicle; determine time required for the on-demand vehicle to travel between locations on the basic route; and have an adjustment function of adjusting said searched routes, characterized in that said adjustment function comprises a function of setting, for said each divided sub-area (A, B, C), adjustment time with respect to the time required when the on-demand vehicle travels on the basic route for adjusting time required when said on-demand vehicle travels on each of said searched routes other than the basic route in said each divided sub-area (A,B,C); and said adjustment time set for said each divided sub-area (A, B, C) comprises adjustment time for adjusting time required for said on-demand vehicle to pass through a location branching out from said basic route (A100, B100) instead of traveling on said basic route (A100, B100), the route data, the required time and the adjustment time are supplied to an operation plan candidate creation section, the operation plan candidate creation section is configured to create, by using the demand information, route data, the required time and the adjustment time, an operation plan candidate corresponding to the user who has transmitted the demand information, said operation plan candidate comprising route data and required time enabling an operation passing through the desired boarding/drop-off location at the desired boarding/drop-off time that takes into account the adjustment time, the operation management means is configured to determine whether or not there is an operation plan candidate, and the operation management means is configured to use the operation plan candidate as the operation schedule. wherein said operation management means is configured to: divide an operation area in which said on-demand vehicle operates into a plurality of predetermined sub-areas (A, B, C); search for routes on which said on-demand vehicle may travel for said each divided sub-area (A, B, C); and determine each of said searched routes as a candidate route; determine one of the routes searched for said each divided sub-area (A, B, C) as a basic route (A100, B100) for operating the on-demand vehicle; determine time required for the on-demand vehicle to travel between locations on the basic route; and have an adjustment function of adjusting said searched routes, characterized in that divide an operation area in which said on-demand vehicle operates into a plurality of predetermined sub-areas (A, B, C); search for routes on which said on-demand vehicle may travel for said each divided sub-area (A, B, C); and determine each of said searched routes as a candidate route; determine one of the routes searched for said each divided sub-area (A, B, C) as a basic route (A100, B100) for operating the on-demand vehicle; determine time required for the on-demand vehicle to travel between locations on the basic route; and have an adjustment function of adjusting said searched routes, characterized in that said adjustment function comprises a function of setting, for said each divided sub-area (A, B, C), adjustment time with respect to the time required when the on-demand vehicle travels on the basic route for adjusting time required when said on-demand vehicle travels on each of said searched routes other than the basic route in said each divided sub-area (A,B,C); and said adjustment time set for said each divided sub-area (A, B, C) comprises adjustment time for adjusting time required for said on-demand vehicle to pass through a location branching out from said basic route (A100, B100) instead of traveling on said basic route (A100, B100), the route data, the required time and the adjustment time are supplied to an operation plan candidate creation section, the operation plan candidate creation section is configured to create, by using the demand information, route data, the required time and the adjustment time, an operation plan candidate corresponding to the user who has transmitted the demand information, said operation plan candidate comprising route data and required time enabling an operation passing through the desired boarding/drop-off location at the desired boarding/drop-off time that takes into account the adjustment time, the operation management means is configured to determine whether or not there is an operation plan candidate, and the operation management means is configured to use the operation plan candidate as the operation schedule.