Abstract: An electronic device may include: a housing having an interior space within the housing; at least one electronic component that is included within the housing; an opening that extends through the housing in a first direction and fluidically communicates with the interior space; and a fluid detecting device that is positioned within the housing, is mounted adjacent to the opening, and detects a contact of a fluid. The fluid detecting device may include: a first member that includes a material or a circuit on a surface thereof, which reacts due to its contact with the fluid; and a second member that encloses a portion of the first member to hinder the fluid from coming into contact with the material or the circuit when the fluid flows in the first direction, but to allow the fluid to come into contact with the material or the circuit when the fluid flows in at least one direction, which is different from the first direction.