An electronic device includes: a housing including a front plate oriented in a first direction and a rear plate oriented in a second direction; a display visible through at least a portion of the front plate; and a biometric sensor module located between the front plate and the rear plate. The biometric sensor module may include: a cover glass oriented in the second direction; at least one light source configured to emit light to the outside; a light detector disposed adjacent to the at least one light source, and configured to receive reflected light corresponding to light emitted from the light source; a light guide disposed between the light detector and the cover glass, and configured to provide a path of the reflected light received by the light detector; and a circuit board electrically connected to the at least one light source and the light detector.