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 . <EOS>