A valuable medium processing apparatus configured to store a valuable medium in a container (21, 22) which is provided with first holes (71a, 71b, 71c) and second holes (72a, 72b, 72c) at an opening portion of the container (21, 22), the valuable medium processing apparatus comprising: a mounting section (7aa, 7ab, 8aa, 8ab) configured to be capable of mounting the container (21, 22) thereto and comprising a first mounting section and a second mounting section which faces one side of the first mounting section, wherein the first mounting section comprises first pins (81a, 81b, 81c) on an upper surface of the first mounting section to engage with the first holes (71a, 71b, 71c) of the container (21, 22), wherein at least three adjacent pins among the first pins (81a, 81b, 81c) of the first mounting section are arranged at different intervals, and the second mounting section comprises second pins (82a, 82b, 82c) on an upper surface of the second mounting section to engage with the second holes (72a, 72b, 72c) of the container (21, 22), wherein at least three adjacent pins among the second pins (82a, 82b, 82c) of the second mounting section are arranged at different intervals, wherein intervals between each adjacent pin of the first pins (81a, 81b, 81c) are the same as intervals between each adjacent pin of the second pins (82a, 82b, 82c), wherein the first mounting section comprises a cover, for covering or exposing the first pins (81a, 81b, 81c), mounted on the upper surface of the first mounting section and on the other side opposite to the one side of the first mounting section wherein a state of the mounting section (7aa, 7ab, 8aa, 8ab) is configured to be set to either a first state in which the cover is covering the first pins (81a, 81b, 81c) of the first mounting section so that the container (21, 22) is not capable of being mounted to the mounting section (7aa, 7ab, 8aa, 8ab) or a second state in which the cover is exposing the first pins (81a, 81b, 81c) of the first mounting section so that the container (21, 22) is capable of being mounted to the mounting section (7aa, 7ab, 8aa, 8ab); wherein the valuable medium processing apparatus further comprises a control section configured to perform a switching process to set the state of the mounting section (7aa, 7ab, 8aa, 8ab) to the first state or the second state, and a locking mechanism configured to lock the cover, wherein the control section is configured control the locking mechanism to automatically lock the cover to prevent a user from changing the state of the mounting section (7aa, 7ab, 8aa, 8ab) by manually opening and closing the cover. a mounting section (7aa, 7ab, 8aa, 8ab) configured to be capable of mounting the container (21, 22) thereto and comprising a first mounting section and a second mounting section which faces one side of the first mounting section, wherein the first mounting section comprises first pins (81a, 81b, 81c) on an upper surface of the first mounting section to engage with the first holes (71a, 71b, 71c) of the container (21, 22), wherein at least three adjacent pins among the first pins (81a, 81b, 81c) of the first mounting section are arranged at different intervals, and the second mounting section comprises second pins (82a, 82b, 82c) on an upper surface of the second mounting section to engage with the second holes (72a, 72b, 72c) of the container (21, 22), wherein at least three adjacent pins among the second pins (82a, 82b, 82c) of the second mounting section are arranged at different intervals, wherein intervals between each adjacent pin of the first pins (81a, 81b, 81c) are the same as intervals between each adjacent pin of the second pins (82a, 82b, 82c), wherein the first mounting section comprises a cover, for covering or exposing the first pins (81a, 81b, 81c), mounted on the upper surface of the first mounting section and on the other side opposite to the one side of the first mounting section wherein a state of the mounting section (7aa, 7ab, 8aa, 8ab) is configured to be set to either a first state in which the cover is covering the first pins (81a, 81b, 81c) of the first mounting section so that the container (21, 22) is not capable of being mounted to the mounting section (7aa, 7ab, 8aa, 8ab) or a second state in which the cover is exposing the first pins (81a, 81b, 81c) of the first mounting section so that the container (21, 22) is capable of being mounted to the mounting section (7aa, 7ab, 8aa, 8ab); wherein the valuable medium processing apparatus further comprises a control section configured to perform a switching process to set the state of the mounting section (7aa, 7ab, 8aa, 8ab) to the first state or the second state, and a locking mechanism configured to lock the cover, wherein the control section is configured control the locking mechanism to automatically lock the cover to prevent a user from changing the state of the mounting section (7aa, 7ab, 8aa, 8ab) by manually opening and closing the cover.