PROBLEM TO BE SOLVED: To provide an agent which can improve activity motivation.SOLUTION: The present invention provides an activity motivation improver comprising vitamin B1 derivative or salt thereof.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】活動意欲を向上させることができる薬剤を提供すること。【解決手段】ビタミンB1誘導体またはその塩を含む、活動意欲向上剤。【選択図】なし