PROBLEM TO BE SOLVED: To provide a taking forgetting prevention myriad year calendar in which taking forgetting of a medicine can be prevented, and whether to have taken the medicine or not can be confirmed.SOLUTION: A taking forgetting prevention myriad year calendar includes: a month display part 81 in which a month letter is displayed to be freely changed a day of a week display part 82 in which a day character is displayed to be freely line-changed and a date display part 83 in which a date character is displayed, and includes: a holding member 5 of one plate shape having a front plate part 2 and a back plate part that sandwich a PTP sheet 1 including a packaging sheet having an accommodation part 11a of a medicine y and a cover sheet sealing the opening part side thereof, in which a front window part 21 and a rear window part are disposed to be penetrated at a corresponding position of a closed state to be folded such that the front plate part 2 and the back plate part are overlapped, and that is made to be a free opening and closing to a closed state and an open state by a thin hinge portion 4 a lock means 6 that holds the holding member 5 in a closed state and a medicine extrusion member 7 that has a hemisphere convex shape part that presses the accommodation part 11a exposed to the front window part 21 to discharge the medicine y through the back window part.COPYRIGHT: (C)2013,JPO&INPIT【課題】薬剤の服用忘れを防止できると共に、薬剤を服用したか否かの確認が可能な服用忘れ防止万年カレンダーを提供する。【解決手段】月文字が切換自在に表示される月表示部81と、曜日文字が並び替え自在に表示される曜日表示部82と、日付文字が表示された日付表示部83と、を備えた服用忘れ防止万年カレンダーであって、薬剤yの収容部11aを有する包装シートと、その開口部側を密閉するカバーシートと、を備えたPTPシート1を挟持する表て板部2と裏板部を有し、表て板部2と裏板部を重なるように折り畳んだ閉状態の対応する位置に表て窓部21と裏窓部が貫設され、閉状態と開状態とに薄肉ヒンジ部4にて開閉自在とした、一枚板状の保持部材5を備え、保持部材5を閉状態に保持するロック手段6と、表て窓部21に露出された収容部11aを押圧して薬剤yを裏窓部を介して放出するための半球凸状部を有する薬剤押出部材7と、を具備する。【選択図】図5