Abstract: A reservation management apparatus automatically determining importance degrees of reservations such as a resource, a scheduling, etc. This apparatus allows an arrangement of duplicate reservations, using the importance degrees, and a determination of reservation acceptance. An entry unit functions for entering the requirements of the first reservation, a storage unit stores information of the second reservation previously entered and registered, a detection unit determines whether or not there is a duplication between the first reservation requirement and the second reservation information, an importance degree determination unit calculates the importance degrees of the first and second reservations and a plurality of items for each of the reservations, an arrangement unit arranges the first reservation as requested, cancels or changes the duplicate second reservation, and refuses to arrange the first reservation, and an output unit outputs results of a determination.