A hand drying device includes: a drying chamber; a nozzle; a supply unit; a hand detection sensor; a control unit; and an illuminating unit. The drying chamber includes: an opening; a first inner wall surface; and a second inner wall surface facing the first inner wall surface. A hand is inserted from the opening into a space between the first inner wall surface and the second inner wall surface. The nozzle is arranged on the first inner wall surface and is configured to blow an air stream toward the second inner wall surface. A center axis of the nozzle and an optical axis of the illuminating unit intersect with each other at a proper position in the drying chamber where a hand is supposed to be inserted.