Keyboard device with liquid expelling function and electronic module thereof

The invention discloses a keyboard device with liquid expelling function and an electronic module thereof. The keyboard device includes a containing casing and a keyboard. At least one engaging hole is formed at the containing casing corresponding to a periphery of a containing opening of the containing casing. The keyboard is arranged on the casing and includes a main body, an engaging ear portion, and a block wall. The main body is contained in the containing opening. The engaging ear portion extends outwardly from the main body and corresponds to the engaging hole. The engaging ear portion is used for engaging with the engaging hole so as to fix the main body in the containing opening. An inverted-trapezoid hole structure is formed on the engaging ear portion. The block wall is formed at an outer edge of the engaging ear portion for preventing liquid from flowing over the engaging ear portion. The liquid flows into the inverted-trapezoid hole structure and then is expelled out of the containing casing.