A hand drying device (100, 100i, 200, 300) comprising: a drying chamber (2, 2i, 202, 302) that includes an opening, a first inner wall surface, and a second inner wall surface facing the first inner wall surface, where a hand is insertable into the drying chamber (2, 2i, 202, 302) between the first inner wall surface and the second inner wall surface through the opening; a nozzle that is arranged on the first inner wall surface and is configured to blow an air stream toward the second inner wall surface; a supply unit that supplies an air stream to the nozzle; a hand detection sensor that detects insertion of a hand into the drying chamber (2, 2i, 202, 302); a control unit that operates the supply unit when insertion of a hand is detected by the hand detection sensor and stops operating the supply unit when insertion of a hand is not detected by the hand detection sensor; and an illuminating unit (12, 12i, 212) that is arranged at a position on the first inner wall surface which is shifted from the position of the nozzle on the first inner wall surface and is configured to illuminate light toward the second inner wall surface, characterized in that, a center axis of the nozzle and a center line of the light emitted from the illuminating unit (12, 12i, 212) intersect with each other at a proper position in the drying chamber (2, 2i, 202, 302), the proper position being the particular position along the center axis of the nozzle between the nozzle and the second inner wall where a hand is supposed to be inserted to ensure efficient hand drying, wherein the hand drying device is configured to notify the user that the hand is at the proper position when a position of an optical image formed by a light emitted from the illuminating unit (12, 12i, 212) on the hand inserted into the drying chamber (2, 2i, 202, 302) and a position where the high-pressure air stream hits on a surface of the hand match each other. a drying chamber (2, 2i, 202, 302) that includes an opening, a first inner wall surface, and a second inner wall surface facing the first inner wall surface, where a hand is insertable into the drying chamber (2, 2i, 202, 302) between the first inner wall surface and the second inner wall surface through the opening; a nozzle that is arranged on the first inner wall surface and is configured to blow an air stream toward the second inner wall surface; a supply unit that supplies an air stream to the nozzle; a hand detection sensor that detects insertion of a hand into the drying chamber (2, 2i, 202, 302); a control unit that operates the supply unit when insertion of a hand is detected by the hand detection sensor and stops operating the supply unit when insertion of a hand is not detected by the hand detection sensor; and an illuminating unit (12, 12i, 212) that is arranged at a position on the first inner wall surface which is shifted from the position of the nozzle on the first inner wall surface and is configured to illuminate light toward the second inner wall surface, characterized in that, a center axis of the nozzle and a center line of the light emitted from the illuminating unit (12, 12i, 212) intersect with each other at a proper position in the drying chamber (2, 2i, 202, 302), the proper position being the particular position along the center axis of the nozzle between the nozzle and the second inner wall where a hand is supposed to be inserted to ensure efficient hand drying, wherein the hand drying device is configured to notify the user that the hand is at the proper position when a position of an optical image formed by a light emitted from the illuminating unit (12, 12i, 212) on the hand inserted into the drying chamber (2, 2i, 202, 302) and a position where the high-pressure air stream hits on a surface of the hand match each other.