An electronic device comprising: a housing including a front plate oriented in a first direction and a rear plate oriented in a second direction, that is opposite to the first 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 being exposed through at least a portion of the rear plate, wherein the biometric sensor module includes: a cover glass oriented in the second direction; at least one light source configured to emit light to an 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, wherein the light guide is disposed on the light detector, and is configured to filter out the reflected light incident at an angle equal to or larger than a predetermined angle with respect to the second direction, and wherein the light guide includes a compound parabolic collector, CPC, structure having a parabola shape and including a first hole facing the light detector, and a second hole disposed to face the cover glass and having a size larger than that of the first hole. a housing including a front plate oriented in a first direction and a rear plate oriented in a second direction, that is opposite to the first 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 being exposed through at least a portion of the rear plate, wherein the biometric sensor module includes: a cover glass oriented in the second direction; at least one light source configured to emit light to an 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, wherein the light guide is disposed on the light detector, and is configured to filter out the reflected light incident at an angle equal to or larger than a predetermined angle with respect to the second direction, and wherein the light guide includes a compound parabolic collector, CPC, structure having a parabola shape and including a first hole facing the light detector, and a second hole disposed to face the cover glass and having a size larger than that of the first hole. a cover glass oriented in the second direction; at least one light source configured to emit light to an 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, wherein the light guide is disposed on the light detector, and is configured to filter out the reflected light incident at an angle equal to or larger than a predetermined angle with respect to the second direction, and wherein the light guide includes a compound parabolic collector, CPC, structure having a parabola shape and including a first hole facing the light detector, and a second hole disposed to face the cover glass and having a size larger than that of the first hole.